My daughter really enjoys coming here. It is fun and all the instructors we had are very nice. If is literally hanging out and following little instructions and it is perfect for her (she's 1.5 years old).
They also do birthday parties and we were invited to one - one instructor was in charge and had all kind of activities ready throughout the party (similar to a class), so kids have been entertained and busy the entire time. It is also cheap if you make use of everything: $69 per months for one weekly class + unlimited entries during open play. For another $30/mo you can take as many classes as you want per week but I would not necessarily recommend that option as the classes are really the same (different instructions and activities vary a little but really the same idea).