I have a 32. Good points are the twist locks lock and unlock with little effort. However, even though the head works with both pic rails and arca, I scarred up a few pic rails thanks to the pic locking peg that sticks up in the center. I finally unscrewed the thing out. The top arca edges were rather sharp and my arca gear would also sit too low in the track and I'd have to rock the rifle up into the channel to get it to clamp. I fixed it by putting 2 strips of fuzzy velcro on the surface of the clamp so the rifle rail sat higher and would clamp easily. The 32 is really flimsy compared to a 39/40mm. It works but I really want to get a bigger one. Regardless, I would check out the 39 and see what you think as they may have improved them since I bought my lesser model. My local gunsmith deals with them and loves that model.