Bought some for the GFs bike in an attempt to weight weenie her bike. After getting the superfly seat post QR a month or so beforehand I wasn't too worried about these. They seem to work well, don't come loose and weigh next to nothing.
Bought some red pads for my weeks trip to Bike Verbier but didn't put any on until the last day bc I was worried they wouldn't be that good. A shame really bc they bedded in quickly and bit well straight away, delivering far better performance than the 'red' pads from another manufacturer* that I had been using all week up to that point. Can't comment on longevity obviously but a nice surprise so
I bought one of these for the GFs bike - part economy drive, part weight savings bc she is tiny. It works well. I was concerned that the rather thin lever would be a bit painful on the palm to close up tightly but the cam seems to work well enough to allow a good grip on the seat post without palm-pain. Good purchase and if they made one in a 29.8 I'd get one for my bike.
Made of hard steel, it's impossible to break. The teeth have a careful finish, so it fits perfectly in your BB. The handle is long enough and the grip doesn't slip away. The tensioning tool is hold tightly, so you won't lose it.
Good quality, good price.