To Nitrous or not to nitrous...that's the ?

Thanks exgmguy. High 10's on the bottle sound good to me . I was thinking of running 125 or 150, would that be OK? Not to sound completely n20 naive, but how does it work, when does it work (does the bottle spray automatically at a certain RPM? Do you hit a switch, do you have to hold it in/engage it and switch it off/disengage it? Anyone else???

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'90 LX 5.0; 12K original miles (no sh*&); 3.55 gears; pulleys;Edelbrock Performer Heads; BBK shorties; MSD 6AL box w/ blaster 2 coil; Motorsport E303 cam; Pro-M 75mm MAF; BBK 70mm TB; Eibach spring kit; Southside welded subs; K&N cone filter charger; Hurst shifter; fiberglass turbo hood; A/C-less; rear seat-less; cat-less; 2 chamber Flos; Corbeau racing seats (fronts);
30# injectors; JMS Chip; 190 lb fp; TFS track heat Intake (12.299 @ 113)