Hi all, just registered here, though I've been lurking for a few weeks.  I've been playing non-stop since open beta, have 2 level 50's (Necro & Rogue) plus several more who are coming along.  Compared to my other classes, here's some thing I've observed about the Harmonious Monk (most of these are in comparison to my Rogue)

1) They are extremely survivable!!! Compared to my Rogue, soloing a Harmo Monk is a piece of cake.  It doesn't touch my necro, but its easier than either of my Tanks, and far superior to my Rogue.  Mid-levels, I'm succesfully taking down 3-dots that are 5 level above my own.  That's unheard of on a Rogue, and damn hard on either of my tanks.  Could probably do it on my Disciple, but it would be a long fight.

2) Offensive stance on a Harmo monk is pretty much useless except in a group.  Solo, I do Far FAR better in Crane Stance.

3) Aggro control abilities on the Monk are way below what my Rogue has to offer.  The refreshes alone make them poor to useless.  Couple that with the fact that they are apparently bugged, and you have serious problems.

4) Harmo Monk Debuffs are GREAT!  Better than my DK that's for sure.

All in all, its a good class that only needs a couple tweaks (especially to aggro management and the offensive stance).