Love the knurling and build quality. The paracord doesn't dig into my wrists during rotational exercises like woodchoppers where I make contact with it. My only nit is that the lengths of the paracord loops are slightly different, which comes into play when I use two handles on a single carabiner (e.g. for low rows). It's not a huge deal though, and if I really wanted to I think I could fix the length difference by re-tying the paracord loop.

The HD version is very solid, but it has a couple of issues. It doesn't offer as much grip as I had hoped (in fact, it slides more easily than having nothing on the end at all, since the edge of the barbell shaft is sharper than the barbell bomb), and without lubrication, it is extremely difficult to get off of the barbell once on. It does, however, do what I want it to do: protect my wall from getting damaged by the barbell shaft, and it works well when propped against a wall. Taking the barbell bomb off is also possible once lubricated, but this is still a little annoying since I end up getting lubricant on the shafts of the barbell as well (which makes it harder to grip during landmine exercises).

It's expensive, but one of a kind. It's extremely compact, and the retractor allows for many exercises to be set up in a way that is not possible on traditional functional trainers. There's a bit of a learning curve, but it functions extremely well once you get the hang of it.