How was the quality? Does it look good?
Found any bugs?
What are your computer stats? (mainly looking for CPU, Graphics Card and RAM)
Did this mod effect your interior cell performance? If so, by how much?
Any suggestions?
Here's my report. I had a quick run through, I might have missed some interiors (just stuck to west side of Anvil inside the city).
Quality: Overall, it looked very good.
Bugs: From what I saw, the bugs consisted of meshes sticking out of random places for the most part. I also saw a few NPCs outside their houses (in the interior cells), and it looked like the ground was too low down. I've uploaded screenshots of what I saw to a photobucket album http://s617.photobucket.com/albums/tt255/WrinklyNinja1/Oblivion%20Bugs/Immersive%20Interiors%20Bugs/. If it's unclear which interior a shot shows, just ask. Though there weren't that many I looked through, so it shouldn't be too difficult to pinpoint them.
PC: 2GHz Core 2 Duo, 4 GB RAM, Mobility Radeon HD 4650.
Performance Hit: I couldn't detect any hit. I've got my frame rate capped at 30, and I didn't see any reduction that I wouldn't see otherwise.
Suggestions: None really.