Ok, I haven't been taking the same benzo as you, I've been using Xanax.
I got to a point last year where I was taking err...up to 6mg three times a week, and 1-3mg days in between them with Oxycodone and at one point Opana (be very careful with both those combos).
Anyway, I got to a point where I could take 5mg and barely feel it, knew it was time to cut back. Managed to taper down in a couple of weeks and went through a mild W/D but got through it okay.
Fast forward about 2 months one night I couldn't find any pain pills, so I decided to just take 2mg of Xanax to help me just pass out. Barely felt those, took another, didn't feel a damn thing. I did manage to go to sleep about 8 hours later though. So I figured I was either fucked for life on Xanax begin effective for me again as a sleep-aid.
So anyway 2 more months go by, and again I'm in a position where I want to buy oxycodone and all my dealer has in Xanax. I got 5mg of it. Then I did something stupid which I won't ever repeat, because the first time in many years I blacked out on them. Didn't take them all at once mind you! Took 2mg, didn't feel much, so took two more and just save the last one for the next day. Well about 10 minutes after I take those, my friend stops in and we toke up on some stuff I had laying around. He had to go meet his girl, but just before he left he said "Here man, these are for you since I know ain't nothing going around and I owe you more than a couple" and hands me two roxi 15mg pills! Fuck yea!
So of course, those got railed pretty quickly, then I said hell why save that other xanax, so I ate it as well. This is about the last thing I remember....
What I don't remember;
- Posting on a bunch of the message boards I go to. Didn't say nothing bad or piss anyone off, in fact I was very nice!

But I don't remember posting any of that shit.
- At some point I stumbled up stairs, and family was home (brother, grandmother visiting). They had brought home supper, KFC with like every side you can order on the menu!

I do remember eating that supper, but then I guess I nodded off on the couch in front of everyone because I was told about it later. They said I could barely even chew my food.
- I woke up in my bed at 6am and don't remember how I got there, was told later that I walked down the stairs around 9pm and they assumed I went to sleep. Although, when I woke up several things in my room had been moved, I might have played Xbox or something.
- I had two packs of smokes when I took the pills, which normally would have lasted 2 days for me. When I got up in the morning one pack was empty and the other had like 5 left in it. ><
I know the combo with the roxi contributed to this, but I have to say that IME with xanax and this combo I guess my tolerace just dropped after I stop taking them after awhile. I've heard that if you go on a really long bindge it could take years to wear off. As for my future, right now I've taken 3 and I feel pretty good, I took 2mg last night to put me to sleep so 3mg is not hitting me as hard as it normally would today. I just plan on staying off of them as much as possible and use them as a last resort for sleep (as in, been up 2 days even when sober, I have horrible insommnia and I've tried everything OTC and went through all the anti-depressants and while some worked they all caused horrible side effects. Some times I just need a benzo to go to sleep, but I also have a habit of abusing them for fun too much. Trying to work on that.
Sorry for the long post guys!