IMO, the price is justified IF...

If you don't care about mileage...not that you won't still be able to get 17-23 MPG on the highway, these numbers reflect my personal experience, yours may vary.
It's very hard to keep your newly enlarged foot out of it around town...it's just too much fun.

And yes, it does sound "better"...another reason it's so hard to keep your foot out of it. That supercharger whine is like motorhead "crack".

Yes, the install had it's trials & tribulations. If you peruse all the threads pertaining to supercharger install, you should be able to pick up enough info. to make it go much smoother.(Making shims for the fuel rails comes to mind.)

I bought mine from Tone & he went out of his way to answer all my questions (& there were more than a few) promptly.

BTW, tbigity, save your money...another electric fan under your hood isn't going to make any more power, as Tone mentioned, it'll probably reduce power by restricting flow in the intake.