This seems like the best design I've seen for the cheap ones, but that retention mechanism makes me wonder how it would hold up over a long period of time.
I've been kicking around replacing the Thermalright AB I have on my OS Optane drive as it actually runs so it's 10-12C hotter than the other ones. The problem I have is that I don't have much room height wise so I think this would be just enough taller it wouldn't fly as my NIC has a heatsink in the way. Been contemplating trying the Thermalright M.2 2280 PRO and since it's pretty cheap I may just do that, but off the reviews here I think the BeQuiet MC1 PRO is probably the only other one small enough to really consider.