Had my Mamba for just over 150 jumps now. Took me about a minute to figure out how to open the visor the first time, now it's like second nature. It's a lot easier to open when you are wearing it. The back of the helmet is adjustable to accommodate different size heads/necks. Not the easiest to figure out how to adjust the first time or the quickest. But once you adjust it, you shouldn't have to again. Taken quite a few kicks to the head/face with combat RW work :) Helmet stands up great, have a few small scratches on the visor, but I suppose it is replaceable if I wanted to. Also jump with a GoPro, mount stays on great but doesn't allow the Visor to open 100%. Over time the visor has gotten a little loose, but was able to remedy that with 92 cents worth of rubber washers from Lowes. Put them between the Visor and Helmet on the pins. Works great now. Have two ditters in it, can always hear them easily and never had an issue with them getting scratched by the pins from the visor. The pin system for the visor is a cotter pin, it will not come out very easily and certainly not on its own. Also I have jumped out a few times and forgot to close my visor all the way and it stayed on, I just closed it in freefall. Well built strong. Also use this helmet in the wind tunnel. Never a problem.
