My ears were burning.
75 shoot should be fine. GOT to be a wet shot. You want a purge so only liquid NOS sprays at nozzle. Put the spray nozzle combo (gas and nitrous) just after the MAF. It doesn't give alot of room to vaporize through the throttle body but you don't want to damage the MAF or it actually knowing what is going on. Let the motor and it'* electronics do their thing, and the nitrous do it'* own thing. Better results would likely be had replacing existing airbox with a 3" x 12" pipe and clamping the flex portion with the MAF in it to that. "afterthought on my part"
Off the line don't get greedy. 1500+RPM then spray. Be careful when activating that you have "room' to backoff the throttle halfway for a few seconds before deceleration/braking. You don't want to "flood" a low rpm engine with nitrous, nor do you want to chance having residual nitrous in the intake manifold when you throttle down. Either can cause a violent intake "backfire" Our plastic manifold wouldn't take the pain. Not sure all that aluminum would fare well either.
I can't speak about reliability, I've only used 3 bottles (10 hits a bottle) and have just over 52K miles on the car. I had my fun but the car is now a Sunday Driver. It'* just another toy I have no time for anymore.
Cheap thrills? Hmm. My kit and extras topped $800 and $50-60 a bottle. Not so cheap thrills.