The TSX is really a very solid car. I was pleased when I purchased it and am now downright happy when I drive it. It represents a perfect blend of power and efficiency. If you don't hog-dog it around town, mid 20's is easily attainable, and on the highway I've averaged 30-33mpg. The features are useful and easy to operate, the interior fit and finish is outstanding, right down the satisfying "thud" of the doors closing. The stereo stands out among "premium" stereos because of its balance - too often premium stereos overemphasize bass to the detriment of the mid and high ranges. Here the bass is present, but gets out of the way for vocals and instruments. Not just a rebagded Accord.
Stereo, memory seats, interior style and quality materials, engine, fuel efficiency, fun factor.
Auto up/down passenger window and auto moonroof. Wish it was a honda badge - don't need the cache of premium brand.