Those tiny shots of nitrous really don't do much - maybe add 3-4 mph on top end. I was running the DR kit and the manufacturer claims the nitrous kit works better on stock cylinders. I jetted mine richer and ran a colder plug and ran 93 octane gas and then added some octane boost as per the nitrous kit's directions. I also added a wheelie bar just in case the bike wanted to violently flip backwards after giving it the juice.
Was all that necessary? I don't know except the wheelie bar wasn't. I don't remember any remarkable cylinder head temperatures. I didn't have a tach on it but rpms definitely went up after the nitrous shot. Was it kind of fun? Yes. Was it worth the money - well I had to know so I did it. Will you blow a hole in your piston if you take the recommended precautions - not unless you empty the cartridge with multiple shots in under a minute and even then I'm not sure. Would I put it on another bike and try again - sure! (edited)