I used to abuse Ambien when I was prescribed it. Lots of fun for the user, not so much for significant others/roommates/neighbors/etc.. It's probably one of the most painful drugs to snort, but oh man that burn became blissful. I used to crush up 10mg and rail half now, half later, sometimes more. What I would feel is a great uplifting, trippy, relaxing, purely fun buzz, I'd eventually go lay down and drift off to sleep. I would get up the next day and soon find out that actually I got back up after I went to bed and did all sorts of things, had conversations, went to the store, full on fights with my girlfriend, etc, and not a single recollection of it. MOST of the time, I would do mindless, harmless things, but sometimes bad things like driving, arguments with people, posts online, phone calls... Also, after doing this for a while, there is an addictive side to it and a definite depressing/anxious withdrawal probably akin to benzo withdrawal. I too find that benzos at any amount don't do a damn things to me and I've been scripted them all, even temazepam.
My girlfriend is totally OK with all of my drug usage and experimentation, even the ones she's unsure about, she is still supportive and always a willing sitter. Ambien is the ONE drug she said that if I use it again she'd leave me. She won't even talk about the fights we've had while I was blacked out on Ambien, so that even scares me.....I haven't had it in years.