Just putting my 2cent in. I have been debating about SC also, one of the things I was worried about was factory warranty. Though I have a 99', so it will be up in a matter of 2-3 months. I also talk to the local dealership on what exactly is included in the powertrain warranty. From what I've heard, it's not very comprehensive, and that any problems I have chances are will probably still be in the hundreds, if not thousands.
As for the SC, I was skeptic of it at first, did a lot of searches on threads and etc. After hearing *many* people saying it's the best upgrade they've had on the VX, I decided to give it a shot. I went through Tone even tho Alpine was cheaper, I wanted to support him from all the other good experience purchases done in the past. The kit arrived a few weeks after what I expected, it was kinda disheartening that I couldn't get ahold of Alpine and find out what's going on with my order.
Tone ultimately kept in touch and helped out, got my kit. The shop I took it to was a very experienced induction, supercharger/turbo place, they try not to get into exhausts and other works. I find that niche' a lot better than other stores I've been to.
From what the techs told me during and after the install that while there were many customized works that needed to be done, it wasn't out of their reach or expertise. They said a lot of the eclipse supercharged kits and others are a LOT worse. They'd rank this in the above-average in terms of kit quality, not the best kind, but not nearly the worst ones out there. They suggest lengthen many of the hoses that were included, and that the SC fuel line be better protected since it was ruptured (during delivery?)
Performance-wise, I don't have any charts to backup what I say, but I do feel quite the difference during take off and after 30mph. Definitely feel a larger difference when I hit 60, getting to 80 or 90 was an ease.
I'm happy so far with the outcome, and that the installation didn't cost wayyy too much ($500 with all custom work).