I've had a few issues with mine, but nothing major (I hope!
lol) Since I've had it installed, I get a check engine light occasionally, with the P0400 error for Exhaust Gas Recirculation. This will occur when I'm at cruising speed. It's not regular, but it has happened frequently enough. It negates all Modes (Sport, Normal and Econ) and leaves it in a Normal state. When it does happen, I use a scan tool to erase it, restart the car, and it's cleared. I think
this might be due to either the mods I have (AEM CAI and full ARK Exhaust) and/or the amount of mileage I have, over 75k. I hope
whenever I actually get it tuned, that might take care of this issue. The other issue I have is an area on the sc, above the belt, that is "leaking" the oil from the supercharger. I say leaking because its kinda of coming through the casing itself, like being porous. I've been told that it's from the casting process and can easily be fixed with a really good cleaning and some JB weld. It's nothing huge, but it does need to be addressed sometime in the near future.
As for the tune, I was finally able to locate someone locally who is willing. Other tuners had decided not to either because of it being a hybrid and/or it being a cvt. That being said, the tuner wants me to get a flashpro (MSRP $695) and it will cost another $550 for the tune itself. This, if it happens, won't be for a few months because of it being a bit cost prohibitive for me right now.
Overall, with over a month of usage, I am still very happy
with the unit as a whole. I feel the added horsepower and torque have given my crz a "new life" at over 3.5 years old and again at 75k mi. The whine from the sc is incredible and I definitely enjoy hearing and
feeling it every time I accelerate quickly. My gas mileage hasn't been affected too adversely: I now average about 31 where before I was at 39.