Z@pi is my choice of sleep aid. I have tried ambien once, and that made me sleep too, but for some reason I favor z@p. They don't always make me sleep through the night, but I take mirtazipin too, and those two together work fine. The only thing that sucks with zopi is that my brain can still be a bit foggy. I can do all things, but later in the day I find myself wondering if I did this or that like I was supposed to hours earlier. I have always done it, but I don't always remeber it without some deep brain searching.