Upsolute does the same thing and I'm here to tell you that it works great! They take out the EProm and put it in a read/writer and first read the chip ti make sure the mapping is consistant with that model of ECU. Then they copy the stock program and keep it incase at some point you want to go back to stock. Then they write the new program and soldier the chip back onto the ECU and you're all set. No muss.... No fuss. I would do it again in a heart beat!!! Best thing I've done to my car. Even better than getting rid of that nasty brake dust.

The downside that I see with Powerchip is that you have to remove your ECU and send it to them. They do their thing and send it back to you and you reinstall it and hope like hell that it works. (Not to mention that Powerchip charges over $600 for their chip tunning and Upsolute is around $400). With Upsolute I was right there with the rep watching everything he was doing. And he checked everything out to make sure all was right. If you don't want to chip your car that's fine. It's not for everyone. But for those of us that have it.... I think I can speak for all of us.... It's what we were looking for.... Better performance.