Not gonna lie, I was very skeptical of this product before buying one at a nice discount at the Arnold. Build quality is nice, and the range of tension is surprisingly large. I wouldn't recommend this as a main portion of your grip training, but I think it's a great option for warming up as well as getting a simply ludicrous forearm pump to cap off a grip workout, especially if doing isometric grip lifts that don't really promote a good pump on their own.
Performance
Value
Build Quality