I've used M9s in the Army for years and yesterday I went to Four Seasons and picked one up used for pretty short money - $350 with 3 mags included (all 10 rounders of course, but I have already obtained a few pre-bans on my own).
I know there are some reasons to not like the 92fs, the major problem being the open slide, IMO. In Iraq I once found a small collections of pebbles in the top of the trigger well - it was still able to function, but I am sure it had the potential to cause a malfunction in a critical situation. The DA trigger needs some work, but I'll sand that down myself - one night's worth of work.
Other than that, here are the things I like about the 92fs:
1. Reliability. I don't remember ever having a stove-pipe, failure to feed, double feed - nothing. That's with several thousand rounds over the course of a couple decades. The gun I bought yesterday cycled that crappy Blazer aluminum case ammo just fine this morning on the range.
2. Parts are everywhere. I mean, everywhere. This is the AR platform of pistols.
3. Accuracy - I have always found the M9 to be pretty accurate, although the fixed sights on my gun are pretty far off. Shoots good groups, but low and left. Once I upgrade the sights this thing will be a tack driver - it will be more accurate that I can generally shoot.
4. I'm practiced with it, so its a good gun for me, personally. It's a bit large for a carry gun and I probably won't have it on me much in the summer, but fall through spring I can carry it in a Crossbreed Supertuck or just OWB it.
It's not the first pistol I've ever bought and and certainly won't be the last, but I've always wanted one and now I have it.