Got this on Amazon because I had a gift card and I could fit it into a small unused space in my gym. I knew it wouldn't be great since it's only like 200-250 bucks depending on sales. And it's not- not super stable, the pads feel terrible, and the starting points of both exercises have big dead zones with no resistance. However, as a temporary solution until I upgrade it does give me the ability to do leg extensions and leg curls with minimal setup time and it's well built enough that I don't feel unsafe using it. It also has enough adjustments that both exercises feel pretty good- no knee pain or anything. As long as you go in without unreasonable expectations, this can suit your needs. Plus for people that like hacking and tinkering with their machines, you could probably make some improvements that I have not bothered with.
Performance
Value
Build Quality