Overall, I love my Maxima. It has been a great car over the years. Excellent, sporty performance for the money. I would say for this class of vehicle you couldn't find a better value. Have 133k on mine now, only serious problems have been a failure in the clutch hydraulics and a leaking radiator I recently had to replace. The engine in the Maxima is rock solid, and if you change the oil when you're supposed to it will never fail. Also, get Yokohama tires on this and it'll feel like you're driving a different car.
Stop making the new generations overpriced. If you're looking at a new Maxima, might as well go for a G37 for not that much more $$, or just go for the Altima, which is now equivalent to this gen Maxima.
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