Bought a 2003 Mazda 6s a few weeks back. Have put a few thousand miles on it without doing any repairs. Pros: Acceleration, comfort, stereo, handling. Have read of many brake and transmissions issues. Fun car when not driving my 2010 Malibu.
I have owned 13 cars and this is by far the best car I have ever owned. I purchased it last year with 200,000 miles on it as a temporary car. However, I fell in love with my 03 Mazda 6 s. It handles great and I have put 36,000 miles on it myself. I have driven it on family vacations because it's comfortable and reliable. When the battery started to go bad, it never left me anywhere. It made sure I made it to the auto parts store and now it's just like new. People seem to complain if they get a lemon. That is a possibility with any car you buy. If I had to take a cross country trip tomorrow best believe I would hop in my 6 and zoom zoom with no hesitation.
The get up and go, heated seats and the awesome BOSE stereo system. My wife and I both prefer to drive this car over our others because it is so comfortable and has power that no other 6 cylinder can compete with. Even my Pontiac Grand am GT is no match for my Mazda.
Little more leg room in the back would be great. Not ideal for people over 5'9 at all. It's a good thing when that's all I have to complain about.
My V6 manual has been the best car I have ever owned. I purchased my 2003 Mazda 6 new in April 2004 and still drive it today (8/14/2014). The only thing that has gone wrong with this car in over 10 years is the water pump once went out and I had to replace a sagging headliner. I have over 150,000 miles on it and it drives as well today as the day I bought it. The paint, interior, and mechanical components have held up well. I read many of the reviews prior to writing this one which stated problems starting around the 50,000 mile mark. I am sure glad that has not been my experience. The car has been a pleasure to drive and almost like part of the family after so many years.