If you have a lot of money to blow, than give it a shot. You'll like it because it seems like you're getting extremely fast results, but really aren't. It will give you a pump that lasts for hours, making it seem like you've gained fast.
It DOES supply your muscles with more oxygen, due to more blood flow. Meaning you can work out for longer.
For the cost of it, it's a rip off. But don't listen to people when they say it's a scam, and it does nothing.
There are a lot of small negitive effects you can't avoid though.
A) You're going to need to drink about 4L of water a day
b) you're going to need to pee almost every 20 min
c) you're going to have trouble sleeping
d) you're going to be all jittery, as if you just had 10 cups of coffee
those are the effects you really can't avoid.