I’m one of those people who will sing the praises of Ambien; I could not have gotten through the past year of college without it, hands down.
Half a pill is enough to put me to sleep, although I’ve been known to take a whole every so often. Even with the whole dose, it takes about 20 minutes for me to start feeling sleepy, and I’m still able to function (write emails, IM, etc.) at any point after I take one.
Once, I did have some strange hallucinations, involving my comforter “moving” like…well, like there were mice under it, but I think it had to do with the pattern more than anything else. Even then, I knew that what I was seeing wasn’t actually happening. I watched for a while with some degree of fascination. No sleepwalking or sleep eating here.
The only problem I have with it is the cost, though I hear that the original formula will go generic this year (hence Ambien CR.)