I've had one for a couple of years and about 400 hrs SEP flying, and its the best for comfort and noise by far, and pretty robust too given its rather flimsy appearance.
Batteries last for ages too.
I bought mine from Gulf Coast Avionics for a considerable saving over the UK price at the time. It's worth shopping around.
I've also been through many headsets over the years. The DCs have been reliable, and I still keep them for passengers. The new DC is claiming to compete with the Bose, but havn't seen any reports yet.