You've had some good replies but I'll add a few more. Pop (and any of the value resorts) do not have hot tubs at the pools if that is an issue (it is for me because I'm old and hurt after a long day in the park). The lobby and common areas seem a little more hectic to me (I've stayed at all the All Stars and Pop, PORS, CB, CSR, YC, BC, BW, CR, Poly, GF, Shades of Green, The Fort in a camper, OKW, Swan/Dolphin) then the other resorts. There is no TS restaurant. The bus areas have actual lines but no shade in those lines as opposed to the shaded free for all bus stops at the moderate and deluxe. I seemed to be able to hear my neighbors and the people outside a little more in the values.
I don't like the rooms facing the pools, it gets loud at night. I've stayed in the 80s and 90s section, they are not preferred but close enough you can walk across the parking lot and get to the bus stop/main building pretty easily. The rooms are a tad smaller than moderate and more than a tad smaller than deluxe.
The big con for us is you have to use the sky liner to get to Epcot and HS, which are our favorite parks. If there is weather, it will go down then it gets ugly. My son is not a fan of heights and is claustrophobic, let that thing stop for more than 5 min. and it wouldn't be pretty. Not having any other option to get to those two parks puts it, AoA, CB and Riv. out of the question for us.