Hello... sufferer of anxiety/panic-disorder here, as well as long-time benzo (ab)user.
It's for sure that one can get pretty "fucked up" on benzos by themselves. Whether or not one finds this state at all pleasurable though, is a matter of personal taste, I suppose. Kind of like with DXM (or dissociatives in general); some people just don't like the effects, and so they wonder why anyone would ever use it recreationally.
But, for those of us on the flipside, these kinds of drugs, "downers" in general maybe, really appeal to us for their CNS-depressant effects. Calling it "euphoria" would be predicated on personal taste probably.
Benzos tend to put you in more of a "state" it has been said, rather than a real "high." Again... personal taste determines semantic thrust. But for those of use who suffer from anxiety, benzos (I dare say moreso than any other available drug that I'm aware of) completely ELIMINATE the anxiety/panic, replacing it with a feeling I can only describe as "normal." With higher doses of benzos, this "normal" feeling can become very dense and pleasant: euphoria(?). Benzos will not, however, eliminate depression, and so one can still become rather sad on them. The understanding that one doesn't have to worry about their anxiety for at least several hours, perhaps even a day, is a real blessing. For chronic sufferers, it is a miracle.
The miracle is a double-edged sword though, as we now know. Personally, I much prefer the option of having to deal with Benzo addiction/habituation for the rest of my life, rather than face an uncertain future with the possibility of no benzos whatsoever. The thought of having to live without them is horrific to me.
All that being said, I actually don't like getting really "high" on benzos any more, even if I do hope that I "feel" them when I take them (which is rare, due to habituation, and because I don't up my dosage -- I'm always trying to keep my dose reasonable, but every so often I allow myself a higher dose, especially when I really need one!).
I used to get pretty high on them regularly though, and they can put you out for an evening if that is what one desires; sort of akin to binge-drinking for a night and then passing out. Except, with benzos, one doesn't get the nasty stimulant after-effects which alcohol is likely to give in the middle of the night.... or is that just me?
As always, a few rules should be kept in mind: don't take too much (blackout), don't take with alcohol (blackout), and don't take a huge amount for a couple days and then stop abruptly (seizures, coma, death?). In the latter case, taper down over a few days.
Be safe out there, and remember: If you're going to be stupid, be as smart about it as you possibly can.
Well, I'm not exactly sure of the conversion of that for that particular med unfortunately. I tried looking up a chart to help out with that, but I'm not sure if I just can't find anything appropriate right now, if I'm looking in the right place, or whether I'm just to slep-deprived at the moment to be of much help. 12-18mg of any benzo seems like a good enough dosage to have you feeling something from it. It could very well be, you've just amassed quite the tolerance. Really can't be sure unless I have a reference-point, like another similar benzo to compare what doses are what. 
