I think the most common issues are that people mod them without a tune, or put a off the shelf tune on the car that isn't specific for the particular car. As far as my experience with my 2008 2.5L WRX it was driven hard a few times and I put 50K miles on it and never had any issues at all. Of course, I was the first owner. As far as insurance goes, I just told my company I had an Impreza, which it is, and gave them the vin#. It's not my fault they labeled it wrong, lol.