Finally rode yesterday, had a wonderful time. Almost left because of wait times but figured we'd just do it. Overall, really wonderful experience, the entire attraction is pretty flawless. I definitely feel like they are inflating wait times to adjust for breakdowns. Really enjoyed the massive theming for the line, absolutely felt like I was wandering the halls of Gringotts the entire time (even the outdoor queue did a good job with minimalist theming)... Looking forward to visiting again sometime, couldn't hear the conversation with the silhouettes in the hallway with Harry and the gang. The preshow system works very well because it felt informal, I didn't see a guard anywhere and really enjoyed watching it instead of wandering past it... Seriously enjoyed the elevators, probably one of the highlights of the entire wait. Really awesome. The loading room is arguably one of the better themed too - never taken out of the moment (although it's a shame they can't unload somewhere else because the cheering kind of take you out of your story). Really glad I only read about some of the technical elements because Ben the ones if ears about truly surprised me. Loved the tilt, really great way to make everyone anticipate the drop. The ride really goes at a great clip, which I loved. Loved the story and the really great screen interaction with the ride vehicle and the track, really sells the mixture of the two. I did notice the thieves downfall effect not working (at least I'm pretty sure I was supposed to get wet). But no part of the experience was ruined or incomplete, and the finale is so phenomenal, absolutely amazing concept and execution. Probably could have used more fog to cover the screen for the launch because as it was launched, the fog dissipated enough to see the hole.
Overall, with all it's kinks, I still rank this as my new favorite attraction. I absolutely loved every bit of it and cannot wait until the next time I ride it. I at on the first row of the second car which really felt like the best mix of thrills and views to me. The other cart only obstructed a small portion of the screen and I really feel like I need to ride again to asses the other rows.
Had a wonderful time and really cannot wait to give this another ride.