I've had my 2004 STD COUPE for a little over a year now and I have had no problems with it whatsoever. I have the sport appearance package and I suggest that upgrade; it makes a lot of difference for a little bit of money. This car is surprisingly smooth at fast highway speed (I'm talking 90+ mph). It cruises easily at that pace and obviously even better at normal 70-75 mph. The handling is wonderful and makes it a joy to drive.
My favorite features are the 16 inch tires with the alloy wheels that you get with the sport appearance upgrade. It really adds to the sporty look of the car. The LS package is even better with the ground effects.
I would suggest improving the fit and finish. The day that I bought the car (brand new) they had to realign the trunk so that it would close properly. Also, there are a few rattles here and there. The seats could be made with a little more support and cushion.