I have 3 of them. 1 of each color.
They are lots of fun, but I have a few complaints.
1) You have to charge them for about 30 minutes and they only last for about 10 minutes or so before needing to be recharged.
2) The blue one I received barely works. I push the power button and it doesn't turn on. We spend about 20 minutes pushing the button over and over before it finally decides to turn on.
Overall they are lots of fun. My daughter loves them. However, we're disappointed that we dont get to...