My experience with the MA-series is as follows.

- MA40 on Suntour Superbe Pro hubs, 3x, 36h - on my conversion for 6 months, everyday commute in downtown SF and San Jose. Sold the conversion, put the wheels on my track bike for street duty, they see about 25 miles a week(+/- 60 miles), been on there for about 4 months now. No problems whatsoever with them so far, and the bike they are on has about 1mm of clearance on the front fork, no exaggeration.

- MA-3 on Suzue ProMax hubs, 2x, 32h - On the commuter now for about 6 months. This bike does at least 100 miles a week, usually more. I just had to have them trued a week ago because the front was rubbing either side of the brake and the rear felt a bit like riding an egg.

Keep in mind that I weigh 180# and ride like a maniac in the city. Even still, I'm not too happy with the MA-3s. Gonna build some Deep-Vs up to replace the MA-3s and see how those fare....