i have bought this yeah racing stand to, and my first impression was: very cool!
but i had the same problem as the other reviewer, the top plate wasn't really flat, so i had to use some washers to.
the best thing is also its worst: it rotates. it rotates so much that i have added some magnets to reduce the rotating.
overall it's a usefull car stand, so i give it 4 out of 5 stars