I believe the name of the whey protein i take is simply called, "%100 Whey Protein"
It's got a lot of protein per serving, not too expensive, and I like the taste. From my understanding small quantities of NO are naturally excreted by muscles during times of strain to increase blood flow, and the supplement increases this amount.
I hear a lot of guys say it gives you a great 'pump'. But thats not what I lack when I go to the gym. And the lack of any actual scientific studies to the effectiveness of NO on strength gains makes me skeptical to dish out $50 for it.
To address the question as to 'How well do those powders work', whey protein is an essential for anyone who goes to the gym consistently. It's the building blocks of muscle. So you gotta have that. As for the creatine, it gives me a nice 'pump' at the gym; and makes me look a lot bigger; but in terms of strength I don't see a difference. And as soon as I go off it I notice I can drop up to 5 lbs in two days, since it makes you hold so much water. The 'muscle' gain you see from creatine i feel is primarily just water retention. Which is why I'm looking into NO, but I don't want to waste my money.
EDIT: Play nice guys, a warmup for some is hell for others. I'm sure what some of you would consider a warmup I would pass out from :-D. I can only run about 3.5 miles before I drop, hehe.