Bought my '10 at the end of March 2010.
First 3 weeks of ownership, I had to drive on a dirt road to get to work.
DIY Installed EVO-R LED Fog Light, accidentally let it ground and popped fuse in mysterious 3rd fuse box. Took 3 hours and extensive forum/Elec. owners manual to figure out where/how/what fuse to replace.
I have a base + sport so I could put in my own stereo. Have 2x 10's in the back in a Zenclosures box. Amp mounted to box so whole setup is roughly 100lbs-ish? Sitting right on top of rear axle. Tried to install Eibach lowering springs. Rear end squatted and gave me dangerously negative camber that could not be adjusted to fix. Initially I thought the boot cup was left out during install, but after visual inspection the boot was still there. I thought since buying them used maybe they had settled to the car differently. This was not the case. Ended up having to get spring spacers that snap in to regain ride height. 2 days later had to have stock springs reinstalled.
tl;dr Don't have a sub box and Eibach's. Not suited for extra weight on top of axel.
Attempted to paint Door handles. Had them primed and painted, all they needed to do was dry. Sitting out on deck wall, on the 1 day in Phoenix it decided to rain...
Door handles had a "turtleskin-like" texture. Had to strip and repaint them.
Most recently, ordered a set of winter wheels/tires from TireRack. On the website they would clear Sport pkg BBK. Ordered and went to install. Fitment was extremely tight, but on jacks, there was clearance. Went for quick test run, one wheel started scraping the caliper. Got it back home asap but the damage was done. Caliper was scraped all to hell and the inner bore of the wheel was pretty gouged as well. Though not completely, ended up the wheel itself isn't true. So had to ship them back and TR shipped me a new wheel/tire set (different wheel).
(Knock on wood) I haven't had any of the Main 370 related issues, but I still have my own with mine. I need to find out how to get the stronger rear hatch springs because I have to manually pull mine up after hitting the button once to get it to release.
Also have some weird vibration noise coming from between the trunk interior panels and rear body panel. So I have no idea what/where it is... Really annoying to me.