Nitrous is safe if done right and you are willing to spend the money on the controllers. Nitrous also isn't damaging if ran with proper window switches and safety nets. But this isn't the key to power for everyone.
Say I am running something a lot bigger then a 35r.....40+ something, this is a application where nitrous can help. Say i am running a new GTX30R or below......don't bother using nitrous.....you just can't shift that fast sorry. Maybe with a dogbox.
Also you aren't going to get the true potential using nitrous +93pump. Just run Meth if this is your plan.
Let me give you a break down of Nitrous users ....
Dumb idiots and Professional drag users....there is no middle ground, No gray area. So please tell me which are you?
You want Nitrous ....spend big, buy a stand alone if you can afford it. READ ALOT!!