It has held up well with maintenance. It is very spacious and has lovely interface and nice features. Great for traveling and everyday travelling. I enjoy the ability to either use the third row seating or fold it down for more cargo storage and the middle seats lay down as well which means I can move furniture.
Bose stereo system, heated seats, blind spot monitoring, all wheel drive, sunroof, seven passenger, leather seats, cruise control, easy to change oil, cup holders, USB port, charging ports, held up well to the salt on the roads in the winter, handles well on icy, snowy roads.
I have had to already update several parts including the radiator and alternator, also had to replace a steering arm, all rotors, brake components and tires. Has required a lot of upkeep despite having a near perfect interior and exterior.
I have had issues with the key fob and the lock mechanism seems to have a short in it. The big tires are quite expensive and they seem to only last a few years. Cup holder size does not really allow for oversize cups / drinks. Some of the features are hard to figure out how to program.
The 2009 Mazda CX-9 has an average owner rating of 4.20 out of 5 which ranks it #18 of 25 other Midsize SUVs.
From the Vehicle History blog
Overall
Front
Rollover
Side
Moderate Overlap Front
Side
Roof Strength
Driver-side Overlap Front