Having owned Mac equipment for most of the past 25 years, I would like to add my thoughts.
SQ - suits my ear, more the tubes than the solid state. I have made money on all of the Mac gear I have sold over the years, except for the speakers. My main regret is selling my MC225 and MX110. Two premier pieces of gear.
BQ - I currently own the MC275, C2300 and MCD500. The MC275 and MCD500 were recently serviced by George Meyer Audio. Expensive but worth it. They are both operating at levels not seen since new. Takeaway is some service will be required over time. Do it.
Value - as stated, I have made money on every piece except for the speakers. The tweeter bank sounded like it would present a mini wall of sound. It did not.
Customer Service - never used.
Overall Experience - personal preferences are front and center. Balance with other components is key. These two aspects are well covered above. For me, VPI Aries 3 table for vinyl and Cambridge Audio streamer work great. Magico A5’s with B&W DB3D’s are amazing. Interconnects from Blue Jeans Cable are awesome. I believe these components are best for me, evidenced by the relative longevity in my setup. Love Mac gear and the way it sounds in my system.