I agree with cstavaru that this is a great upgrade. I have the bmw performance suspension, performance exhaust, and had the kit installed last week. Much like cstavaru, I have to be concerned with the warranty and appreciate bmw releasing a tune. With the tune and other performance pieces, the car is really a lot of fun at this point. A few pictures attached (difficult to capture the new fan and radiator, but you can see a little in the pictures).