I EDC'ed a Douk for a few months now, and absolutely loved it. Loved, as in past tense, since someone stole it while I was on the North slope this last hitch.

I'm currently carrying a SERE 2k until I can get another Douk or two in.
I like the Douk better than the Opinels. it was much easier to open and close with gloved, stiff, or numb hands, and of course, there was no trouble releasing the lock....
I've EDC'ed it in the woods, the oilfields, and around town, and it's a favorite for me. slim enough to forget it's there, sharp enough to shave my face with (which I've done a few times now) and it generally took a good beating falling on steel pipe, concrete, from scaffolding, etc. with no serious injuries. And at the price I paid for it, It didn't break the bank when it was stolen. (my heart broke a little though)
the Turkish clip point is real handy for finite cutting activities, like cutting out a sheath from leather. Kinda gives a little finger rest...
The edges on the back of the blade are very sharp, but on the other hand the spine of my Douk Douk is the best thing I've found for use with a Swedish fire starter yet, and it's also nice for scraping paint, etc. without messin' up your edge.
The knife was easy enough to sharpen, I sharpened it on coffee cups, bottles, other knife spines, etc. with never a problem. no need for the latest, greatest unobtainium diamond inpregnated sharpening jigs with this one.
The sharp handle edges did kinda suck, but ten minutes with some 320 grit sandpaper rectified the problem handily. I've still got a few Opinels around, haven't ever tried tried a Mercator, but...for now I'm havin' a tough time gettin' by widout me widdle Douk Douk and can't wait to get another one.
Did I mention my Benchmade 630 disappeared at the same time as my Douk Douk? screw the Benchmade! I want my Douk back!!
