I guess those at the top of the food chain are always prone to get knocked down regardless of how well they perform. I have a Mac MC 275 paired with a C2700 and I’m totally satisfied not only with the product but also the company. I’m sure their are better and their are also much worse. When I had an issue with the pre-amp they referred me to a repair facility and it was taken care of quickly and without question. Trying to get support from other companies can become a blame game rather than concentrating on the problem at hand. What I have found from a performance standpoint is what your trying to drive can make a big difference. Under or overdriving can make or break any system. For my Harbeths the MC275 is more than adequate but I would definitely up my game plan if I was attempting to drive a pair of MOABs.