Love these things. I think they are great addition to grip training. I have now bought a half of a 20lb/30lb/40lb/50lb/60lb.

This works great for what we use it for. My wife wanted to do assisted pull up so we we take this and attach it to each trolley on the areas 2.0 and she stands on this and then can do pull ups from front pull up bar of ares.

This worked great for my wife's contraption she made for doing weighted reverse hypers from ares 2.0 and rep utility seat. She used this to connect both ankle cuffs to low row connection on ares.

These are good for the money. My wife uses them as part of a contraption she came up with to do weighted reverse hypers using the ares 2.0 and rep utility seat.

These are great for specific exercises. I will say my wife prefers ones that can bounce easier and higher. I used these a lot for doing wall ball exercise where I threw the ball up at wall and squatted down and up to catch it and would make it part of a circuit. These are well made but can cost more than others.

I enjoyed using this and I used it every workout of a while. I went with concept2 as I considered it kind of the default and price was better and it is a little wider for your legs. With this water one you legs are very close together and it can be uncomfortable for guys. I did like the feel of the water based pull. Also think these just look nice in the gym.

This worked fine for what it is but again being non standard it would only work with this racks weight stack. Also you had to have this as there was not enough weight in the stack for things like rows and pull downs.

This was way too expensive. It was also insanely heavy and hard to move around and attach. It also took up a ton of room and was hard to store somewhere. In the end I just never used it for leg curls/leg extensions. As with everything else this went with the rack when I sold it. Again as I have said just not a good company.