Sorry to be the total opposite, but I hated it. I have to say, going in, I knew I didn't care too much for the recording, but the songs, in context, weren't awful. I think "Bikini Bottom Day" was the standout solely because they reprised it like 12 times, which I think they should have reprised the Panic! At The Disco song instead, or the Squidward song since that's what the merch was referencing. But none of them propelled the plot forward, so not bad songs, but not really meaningful.
The design built out of the theater was cool. It's very Vegas, and a lot to take in, but the actual set/deck of the show is very simple. There's some pieces rolled on, and maybe one or two tracked elements, but other than that, it's a lot of pizazz without a lot of actual set pieces.
The performances were all around great. I think Ethan is giving a terrific performance. His accent went a bit "Jewish gay" for awhile, but it was better than the super nasally sound we get on the recording. But his vocals were great, and I thought he was terrific. I thought the Patrick was a bit of a let down vocally and acting wise. He had zero energy, and every time he was on stage, I just felt the energy sink. Gavin Lee was fine, his big number went over well, but again, why do we care? I don't know. Wesley Taylor was good, but again, he didn't really have any moments to shine, so we didn't care. The standout of the entire cast was Pearl, since she was given moments to really shine. She was great.
Overall, the book is confusing. It's at times incredibly boring. I had a whole group who didn't show up after intermission, and a mother and her child fell asleep during the second half. It's too long. 3 hrs for a children's show is terrible. There is basically no plot, or there is a lot of plot? I can't quite figure it out. Either way, we don't care at all. And the design is confusing. They are climbing this giant mountain...made out of boxes? But then they get to the top and it's made of ladders? And then he throws something down the inside..but it's not in perspective, so it looks like a giant spider's web? Huh? And then they roll on ladders from Home Depot...it's all very confusing and uninteresting. Sure, I'd categorize it as "fun," but there needs to be more. There needs to be about 100% more comedy.