I've used it on my hardtail 29er MTB, my 2 year olds balance bike and my 4 year olds 16". It's been excellent. I'd rather the tension knobs have a cam lock for the final tightening but they work perfect as is!
Very nice construction, heavy gauge steel pipes, top quality head clamping assembly. Very well built, was not expecting this quality based on the item pricing compared to others.
This stand certainly eases the frustration of working on the kids' Walmart bikes without paying for an expensive stand. Instructions were a bit hard to understand, but there also isn't much to assemble. Works well for my application.