Almost 2 years now and no problems at all. I suggest to use this intake air with the unit otherwise you can feel the motor gasping for air when you use in sport mode. The manufacturer stated that this unit doesn't increase speed, I kind of disagree, I installed in a Chevy camaro, 6V 3.6 manual transmission and even in the 6 speed the car is still looking for more road. It took me a little while to get use to the different modes. Once. I mastered one mode I move to the next. Also, I strongly recommend not to be changing speed modes while you driving. Try to stop the car and then change mode. I'm totally satisfied with this product. Have fun!