For the average Joe, a good n2o kit will make goobs of power for a small amount of coin.
To consider a turbo or supercharger legit while saying n2o is not is not logical. They are all considered power adders. And to say it is hard on internals...sounds like your talking out yer ass because all three are, just with n2o it is way to easy to just bump it up, hence the bad rap about internals. Take your average v8 f-bod, can handle a 150 shot all day long, no probs. But you get some goof who decides to up it to 250 and all of a sudden n2o is bad.
Until you ride in a bad car that runs a powerful, well tuned n2o setup, don't bad mouth it.