This is actually my favorite 2D Disney movie to be completely honest. I understand why some don't like it, and it isn't one of their most ambitious films, but it's cute and humble, and has a lot of heart. I love the setting, the characters, and the 80s-ness of it all. Some say the soundtrack isn't memorable, but I really think the only not-catchy song in the whole thing is Good Company.
I just wish that the bond between Oliver and the gang was solidified more before he ends up in Jenny's care. They really weren't together for that long. Also, Georgette needed more of a redemption/motivation to have a change of heart. She doesn't ever really feel bad about getting rid of Oliver, or have any reason for doing so, but she still wants to help all of the sudden in the climax. It didn't ever seem like she cared about Jenny that much, why would she be jealous of Oliver?
Anyway, I still love this movie a lot. Oliver is fucking cute.