My wife got me the Mach I for Christmas 2 years ago. Since then I've used them in everything from light pistons to twins to the Dash 8 and now on the 145. Just recently I got the earmolds (through another vendor) and they are great. I couldn't imagine having to wear the vice-like DCs on my head all day. And Lightspeed customer service is awesome. I have had some issues with the tie clip and belt clip breaking, but each time I tell them about it they get the parts to me within a couple of days. They offer to fix it themselves, but I don't want to be without it for any length of time.

Great headset, worth the money.