Here's my experience, we were down there the 17th-22nd, so we got a little before and after Genie launch.
The first few days we were down there, (pre genie), crowds were minimal, most things were walk ons, or a very short wait. Honestly it was one of the best ride experience days we've ever had there.
When Genie launched, crowd swelling was palpable, it seemed to be locals driving it up, just from what i was observing, i think a lot wanted to try it out.
I thought that Genie worked pretty well, definitely not the nightmare scenario many speculated about on these boards
IA$ was what I expected, for highly sought after rides, RoR in particular, it was sold out in minutes. It also had a snag in it, that wouldn't process your order the first few times you went to push an order threw, but would eventually take. It ended up costing us a wait time for 5 minutes into the future (not a big deal), but still cost us our original booking time for MMRR.
The free version was OK, but felt cumbersome, and we didn't end up utilizing it all that much, maybe to check on what time our next dining reservation was, but that was about it.
LL was good, and I would say mostly a positive, especially with a 2 year old, and the crowds swelling once Genie was launched. that being said i did have some problems
1. I was unable to book times for LL after 2PM in other parks, and we did have the hopper, unless we were physically in that park. (Maybe it was just something i couldn't find on the app, but even if it was, they should have made it easier to find/ more user friendly if that was the case).
2. I wasn't in love with the fact that I couldn't cancel an LL that i no longer needed, we booked one for Smugglers Run, but were able to walk on, so LL wasn't necessary. I can understand why Disney wouldn't allow you to do it, because unused LL work to their benefit, but I am not in love with it.
3. Some rides were booked way out in the day at 7am. One day, Slinky dog was available for LL at 5:15pm, and that was at 7:15am. Again, I understand why this happens, just not thrilled with it. I do think that, that in and of itself will start making 1/2day parks into full day parks, and that would be another win/ good thing for everyone, it would hopefully ease up pressure on MK, and Epcot.
Other than above, I really enjoyed it, and didn't even use it every day, we did Food and Wine an entire day, and didn't need it, and I liked the option of not having to pay for it on a day I didn't need it. I would wager in the future they offer it as a package for 1 flat rate for the length of your trip, kind of like memory maker now.
All in all, i give it a thumbs up