I've stayed at the Poly, WL, YC, AKL Concierge, and POR-Riverside (back when it was called Dixie Landings). We are also a family of 5, and what I thought were a family of 'deluxe snobs' because we also didn't like POR. I *thought* it was the "motel" feel of it, but after staying at Pop from 8/26-9/1 this year, I think POR just wasn't a theme we enjoyed, and if I recall correctly, the heating/cooling was under the window and was loud and annoying. At Pop, the thermostat is on the wall, and even though the door opened directly to the outside, it didn't feel "motel-like" inside the room. We thought that Pop was a very good value for what you got. (And with
free dining - it was an especially good value for us!).
Room Size
Yes, the room is small, but with 2 rooms connecting, we felt like we had adequate space. A room at Pop is only a little smaller than a room at POR, so 2 rooms at Pop will be quite spacious in comparison. And everyone will get their own beds. Except for the parents - Pop only has double beds, and they seemed pretty small when I'm used to my king size bed at home. But the beds were comfortable. Not luxurious, but adequate. We brought along curtain rods and hung a shower curtain between the room and the sink area. (I got a Tink shower curtain and a Mickey shower curtain off of Disneyshopping.com pretty cheap, so I dont think it looked too "ghetto" as others have said). As for the size of the actual bathroom (toilet/bathtub), I think it's the same size as the one at the YC!
Thin Walls
Yes, Pop has thin walls. For me, it was only a problem the first night. I used one pillow for my head, and that pillow was pushed up against the headboard. I could hear everything in the room next door - until the neighbors finally went to sleep and then it was fine.

The next night, I put one pillow up against the headboard, and then slept on a second pillow, and voila, no sound from next door. Worked for me. My DH and kids never heard anything, and had no complaints about the thin walls. As for the flushing toilets, yes they are loud. But I read a tip to make sure your bathroom door is shut at night, which is what we did, and I never heard any flushing toilets or showers running. We were also on the top floor, so that may have helped as well. We were on the first floor at YC and I could hear toilets flushing - even with the bathroom door shut - so the floor you are on could very well be the factor in hearing the flushing sounds or not. I brought along ear plugs just in case, and ended up not using them.
Resort Spread
The buildings at Pop are not as spread out as at POR-Riverside. At POR we were in the Alligator Bayou section, building 15 I think, and it was quite close to the bus stop (walking through a parking lot to get to it) and the food court. At Pop we were in Bldg 2, 50s section overlooking the Bowling Pin pool. The parking lot wasn't very far, and the walk to the food court was reasonable - not right out our door, but a 3-5 minute leisurely walk. Bus stops were a little further than the food court, but not much. BTW, I was alarmed when I got a room overlooking the pool - I had heard they were really loud, but we didn't hear any noise from the pool. And people were out in that pool WAY after midnight making lots of noise. Once the door to the room was shut, we didn't hear the pool noise. Although early one morning, we did hear what we thought was a rumbling of an airplane - turned out to be people walking by with their rolling suitcases.
Buses
I hated the buses. They were very crowded whenever we used them. I like the idea that the buses had a queue for each park (at POR you just wait until one shows up - no queue and sometimes we were all waiting on the same bus and didn't get on that first one). But the lines at Pop and for Pop were ridiculous! Even between 11am and noon, there were lines of people waiting for buses at Pop. And coming home after a park closed - THAT was pure madness. Especially at MK - the bus stop for Pop is the furthest away, and the crowd queued up there was incredible. We got into the line, and it was not until the 4th bus that came did we get on. And that was standing room only. I think in the week we were there, I was able to sit on a bus only twice. All the rest of the times, it was standing room only - or wait another 15-20 minutes. My other compliant with the buses was the route they seemed to take to get to the different parks. Pop is really close to MGM, but yet it took 12-15 minutes to get there by bus. Well, actually another complaint is that the drivers of those buses really seem to go too fast around the turns - here we are hanging on trying not to end up in some stranger's lap while the bus flies around a turn - and seems to make many more turns than necessary. After a few days of this craziness, we decided to start driving to the parks - and wow, what a difference. Very easy drive to AK, MGM and EPCOT. (We didn't go back to MK again.) I guess my 2 cents on the bus situation is that I wouldn't use them again, although I would definitely consider staying at Pop again. Although Poly is still mine and DH's favorite. And AKL is DS's favorite. My other 2 kids seem to be happy wherever we go - no favorites per se.
Food Court
I am used to much less crowded resorts, I think, because I found the food court to be CRAZY. People everywhere... and at all hours it seemed. We arrived late on 8/26, I think it was 10pm or so, and the lines were incredibly long at every one of the food stations, and then after waiting in those lines, you had to wait in huge lines to pay for the food. It was a madhouse. The mornings were no better - maybe even worse. Lots of people waiting in line just to fill up their mugs, no tables to sit at... Now to be fair, it was during free dining - where it seemed like most people had no idea what was included in the plan, and the checkouts seemed to take forever. As another poster said, the food court seemed to quiet down between 1-3pm but the other times - be prepared for a crowd.
But on a good note - the food itself was actually quite good. Especially the Chicken with Penne Pasta. The pizzas are tiny and cost over $5.00, which I think was quite expensive for what you got. Everyone enjoyed the Pop waffles - very cute. I didn't especially like the tye-dye cheesecake with the red velvet crust, it was ok, but not something I would get again. The carrot cake was good, as were all the pastries/muffins. And the salad with the feta cheese, that was very good.
General concensus from the fam was that Pop was a fun place to stay, it wasn't 'deluxe' but for the price it was an incredible value. We loved the huge icons, we liked our rooms, we found all the CMs there to be extremely helpful, we were surprised at how good the food was at the food court and how very clean everything was. We didn't like the "crowded" feel of the Hippy Dippy pool, check-in line, concierge line, food court line, bus line... you get the picture... lots of people waiting in lots of lines. But for $164/night with free dining... hmm... we worked around the crowds and had a very enjoyable time at Pop. {I wonder what it's like when Pop is not crowded?, or is it always crowded?}