I got one pretty well when they first came out. Agreed about being a stout folder. Mine was shaving sharp out of the box - I would say about the same as a Buck 110 but not as sharp as my Spydie Delica. The difference, though, is very little

It's a great buy for the money and I actually used it a lot (but not that hard) for a while. I work in an office environment but casual dress (aka blue jeans/golf shirt casual in my division). I found that it was a bit bulky for my week days things but nice for my weekend things. I carried mine in my back pocket and it was fine there, but it was still a bit bulky. Considering how many cardboard boxes I've knocked with that blade, the coating has held up real well. I can't give a good comparison against other blades on edge retention, because I haven't cut an equivalent amount with some of my newer ones. The only one I had at the time, was the CRKt/Crawford Falcon(large one, AUS6A) and the M1 definitely holds an edge longer. The Falcon's handle is more comfortable for extended periods. Both are very easy to touch up. The M1 is one of those ones that begs to be "flipped" open and mine got flicked at lot. The liner and tang have not really worn all that much, all things considered. The liner was flush to the edge of the tang when I got it and now, there's just a tiny bit of space, maybe 1/64 to 1/32 of an inch. I've done a lot of cutting with it but generally I don't "torque" that much, so this is probably not a good indicator on wear by any means. Haven't had to adjust the pivot and the screws haven't worked loose, which is pretty good - a few have worked loose in other folders.
Do I still use it? It still occasionally gets into my weekend rotation - I have a lot of folders in my collection/accumulation, and as I add more, many just get fondled but not used. Currently, I'm enjoying my latest acquisitions - Spyderco Paramilitary, BM 550 Griptillian (thumbhole, modified sheepsfoot) and BM-556 Mini-Griptillian)
Hope this helps - gord