I've had it a couple of times in the hospital. It's amazing stuff, one second you're awake, the next second you're asleep. They turn it off, and you immediately wake up. Not groggy, just wide awake.
If you lie awake for hours and hours every night, and you have Michael Jackson's money, you'd definitely try it. Fortunately for me, I don't have access, and I understand how dangerous the stuff is unless you are medically supervised, better than MJ was. I'm not crazy.
But it surely would be nice to be able to just go to sleep, dammit.