Ours is a 2000 (so a half-generation older than the one in question in AL) with almost 300,000 km. It gets the standard DD abuse but has given excellent service. The transmission is now getting a bit tired. Visible rust at the bottom of one door has just started, and that's from a life in Toronto & area (i.e., a decade of real winters where they use salt.)
Mazda dealer parts can be an issue; I was told by a tech that the Head Office geniuses periodically change a bunch of part numbers but (!!) keep this information to themselves, so that you try to order something that exists but nobody can find it. He may have been stringing me along & trying to distribute blame for delays, but it sounded sincere at the time.
Bottom line: we've been very happy. Working sliding-door windows rock, and the disappearing rear seat is outstanding (although you do have to remove the headrests first – but so what.) Unscientific tests indicate it's quieter in the back seat than a late-model Odyssey.
We'll probably get another one to see us through the end of the minivan period of our driving lives.