I am a proud owner and user of revolution - so much so that I am known as the "Harlem Globetrotter kid" at a local restaurant. The gimmick is NOT usable with one card - not without a fair bit of DIY disguising it. With that said I mainly use this with my invisible deck routines, as a fun flashy flourishy move, or just showing off and catching someone's attention.
For those who have bought it already - stumbled across a way to vastly improve your spins. I got four and a half minutes yesterday and only found this method the day before that: with practice I may be able to break five minutes. Simply get a good even spin as Greg teaches, and then bring your finger about chin level and give it a good hard blow. You'll basically have a pinwheel on your finger, and it doesn't lose any friction.
Best of luck getting the longest spins of your life!
P.S. Just in case my opinion was not crystal clear I worship this gimmick - have applied it to almost every deck I own and religiously take it with me anytime I leave the house. 1000000000000000000000000/10