The rollers are terrible. Very difficult to move due to that. Always need to be careful or it'll topple over when moving around.  The lifters are separate, therefore they can be at different heights if not careful, which is annoying. Lifting and lowering is annoying, too, as you need to hold the top while untwisting each side one at a time so the thing doesn't fall. A different raising and lowering sytem it needed where both sides raise and lower at the same time without wory of it falling. Like a clicking system as you raise, that you can push a button to release when lowering. 
The top also angles too much. It can barely almost get flat, and if you rest an arm on the top, it won't hold it's position, and start angling down.
The stars are for the look, and that it can get high enough.