Well made for the price but the three wheels can't be held in a straight direction. So if you want to do a steady straight rolling shot the wheels revolve as you move and it starts moving in unpredictable directions. I'm going to adapt it by screwing some plates in - which won't be straight forward. I wish I had paid more for one that holds the wheels straight.
Sure, the wheels lock so they don't move at all - but that sort of defeats the purpose.
We used it for a professional documentary on a Canon 5D, dolly wasn't essential but would have been good, we got some usable footage but quite a few takes with it running amok.