Traded in my 2004 with 111K on it for a new 2008 Mazda 6I, all the bells and whistles, leather heated seats and interior, CD player with awesome Bose speakers, sunroof, heated mirrors, compass in autodimming mirror, etc. Owned this one for 7 years, just spent my first out-of-pocket on a replacement headlight bulb. Absolutely no other issues or complaints, and I push my vehicles hard. This one did 135 MPH in Death Valley a couple of years back, and the radio plays louder the faster you go!! Armorall the entire leather interior annually, holding up perfectly.
OK, first I need to provide a little background on my previous vehicles; my last 6 vehicles have all been V8s, they have also all been GMs. That being said, a 4 cyl. motor is going to feel down on TQ and HP, no matter who builds it. And, I was fully prepared for that before I bought the 6. I love this car, period. I am a sales rep and I drive a lot for work. I wanted a taut, well mannered car that had a sporty feel and was good on gas. The 6 fits the bill. I bought my '08 used with only 8300 miles. For the price this car can't be beat. Long road trips are a breeze. I can drive 250+ miles nonstop, and get out feeling very little signs of discomfort or fatigue. I am 6'3".
I bought my 2008 Mazda 6 with 36,000 miles on it. Right away, I had A/C issues. With 90,000 miles on it, I had to have the transmission rebuilt and change out the valve body. As I now understand it (reading consumer reviews on the issues of this car), the valve bodies are made overseas and built with a poor grade metal so these cars have transmission issues. I finally sold the car 1 month ago having rebuilt the transmission and fixed the A/C 3 times. I had only heard good things about Mazda's, but I won't buy another one.
I bought my 2008 Mazda 6 from a tow yard - kinda sketchy I know. But I test drove it, had it inspected by a Mazda dealership (highly recommended) and I fell in love with it! It had ~104k miles and was being sold for $7,500. 1.5 years and 24k miles later and I've had absolutely no issues with it! I've driven it for ride share companies, through the crazy hills of Berkeley & San Francisco, taken my girlfriend to the Grand Canyon, driven in snow - it's always been there for me! Sadly, my car was taken from me when a 65-year old lady ran off the road and totaled my parked Mazda 6 with her Mercedes-Benz :( Now I'm back on the market for another used car that will satisfy me the way my car did
I have now owned this car for a year now and added over 25K miles to the odometer. I bought this car for commuting and second car as I also own a 2012 Ford F-150 and my wife has 2010 Camary. The only bad thing I can say about this car is the leather is not very good and cracked under the front corner which does not get any wear from sitting. Other than that, it gets 29 MPG hand calculated at every fillup no matter what gas or the season. The little 4 banger is peppy and gets to speed well. The gearing of this car is terrific as I find many cars are not geared well with mismatched engines. Mazda did a wonderful job matching the transmission to the engine.