I've been running the Gen2 for about 2 years now. It adds a lot of flexibility to dialing in the tune of the car. The adjustability of the fuel and timing are a big aid in getting the most out of the car. As far as the wideband, I recently got the time to start fooling with it, and have already seen big improvements in the way the car is running. I can see having a pretty good handle on the tune, in the next few times out. For me, there was a learning curve, but it has also given me a better understanding of what the car needs to run better.