Recently bought one. Same as CJ autos version, bought unused but sat in a crate for some time.
It seems a fair solution, I have the spitfire on full tilt with back wheels on the ground. However, despite mine being "adjustable" width, the choice was too narrow or too wide, I was not able to get it just right. Solved using some lengths of timber
Getting the balance point is difficult. And hard to wind up when at ground level, gets progressively easier.
I think I am pleased with mine. No space for a 2 poster, and a "scissor lift" is way too heavy to move about/store.