Product review (4 stars): pretty cool but hard to master
I ordered a pair for myself.  At first it looks easy but when i tried it out , it was so hard.  I think if i had enough patient i would mastered it.  Anyways, be prepared.  It is not as easy as it look.  It took me around 1 week to get the hang of it but i couldn't keep the momentum and couldn't turn.  I just realize that this is only use on the street.  If you try to ride on sidewalk or something, it's hard because of the cracks.  Especially when you move from sidewalk to side walk, you should watch out for the bump.  I prefer sticking to the old roller skates 1 since i feel more secure and can easily move from sidewalk to sidewalk.  Good luck to all those who attempt to master it.