That guy with the blown up Maxima didn't have the bottle heater wired correctly.
Personally, nitrous scares me. It is very hard on engines/drivetrains in most cases. Most people start out with a reasonable HP boost but end up changing the jets to a point where it becomes harmful to their engines. I wouldn't be surprised if they outlaw nitrous oxide someday. The initial cost appears lower but if you figure in all the bottle fills and accessories like a bottle blanket and purge valve, it costs more than a s/c in the long run. Forced induction, either s/c or turbo, give you power on demand all the time and not just in few second bursts.