I just recently bought the Mach 1, and have been so so results with them. I was looking to upgrade my headset and thought hey why not? Well, after 3 weeks with them, I think I"m going to give them up and try something else. They offer great sound pick up, and I haven't had a problem with them moving all over the place, but could see that as a problem down the line. The only problem I have with them is the noise. They do a decent job, but no where near a good headset (bose X) does. I did a back to back flight in them, in an Alurus, which is a loud, single and he bose was much much quieter. If I was doing this again, I'd buy them, try them out and return them if it doesn't suit your needs.