I had one for about 6 years, the reliability was flawless in that time. The feel was really good; I'd dare call it perfect (for an auto) in 2nd to 6th gear. My only (very nit-picky) complaint was that the lockup was so good 2nd and above, that it made 1st gear feel a little slushy from a stop. Very nearly impossible to induce tire spin from a stop on dry ground (probably tuned for longevity), so don't expect it to be a tire roaster. That said, the tranny always did what was expected of it; Manual mode is really good, practically feels like an actual manual transmission above ~15-20mph. Shifts were pretty fast, maybe not the fastest ever, but the tuning and gearing are very good.
It really is the Mazda of automatic transmissions. It won't win any drag races, that isn't it's purpose. Throw it over into manual mode, pick your own gear, and go carve some corners. That's where it feels at home.