The only thing I have found so far that really annoys me are the door seals. The seals next to the running boards are too far to the interior. As such the running boards get pretty grimy because they suck road dirt up. Then when you get any water it drips out dirty grim. It is most noticeable near the engine badge.
The other minor issue is the hatch. While there is cup for one's fingers to pull the door down they are on the interior of the door rather than bottom. This is a common ergonomic problem with many hatch back doors.
I guess for those with an M-Sport the trim is slightly wider than the black trim on the other lines - thus those who want muds flaps have to do some mods to get them to fit.
Edit to add like others the gas milage is also far less than I would expect. We are seeing around 20.4 in the city. Here is what the Feds say:
http://www.fueleconomy.gov/feg/Find....n=sbs&id=33521