i've owned this unit for a couple years now and I've put it through its paces. With 600 pounds on it as a leg press the tracks slide fairly smoothly but the range of motion feels somewhat limited by the stop arresters at the bottom of the tracks, which are not adjustable.. it is billed as a calf raises but with full size plates loaded you cannot get good calf extension because if you put the balls of your feet at the bottom of the push plate thenyour heels hit the weight plates. I found the surfaces far too slippery for my tastes so I applied a couple rolls of gorilla grip tape to the press pads. they are covered with a diamond pattern but it really doesn't provide adequate grip, at least for the smooth soled shoes I tend to wear while lifting. In the hack squat configuration, the shoulder pads are sufficient and the load is comfortable. Again, the range of motion seems too limited... maybe that's partly due to me not being super tall (5'10"), but it would definitely be nicer if I could get a couple inches deeper on hacks and on leg presses. On the plus side, this unit is pretty cheap for a leg press and it has a relatively small footprint, which was the main consideration for me with my tiny basement space. So far I have tested the leg press up to 800 pounds and it has handled the load with no apparent difficulty. All in all, I think this is definitely a unit where you get what you pay for.... and it is not expensive.
Performance
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Build Quality