I also got the reflash done, it was quick and easy. I think I may have gotten a slight gain in HP, but that could just be wishfull thinking. Guess I should do some G-Tech runs, since I know what it did before the reflash. And there was a recall on the actual O2 sensors for some 00 and 01 cars, I guess there was a bad batch that Subaru got. That one is VIN dependant, and not all cars needed it (mine didn't). But that sensor recall was about a year or so ago, guess it just took them a while to get to you, unless this was al about the reflash, and even then, I got mine done about 4-5 months ago.