got my set today and played around a bit. a quick review:
among the outstanding features:
screen quality and response is probably among the best i have seen so far, as good as nexus one; response is also the best for a 600 Mhz (in fact it feels faster than both the nexus one that i have owned); call quality is amazingly good -- you feel like the person is speaking right next to you without feeling like others can overhear your conversation (which was how i felt about my milestone, which is that it is so clear and loud that it is leaking to someone else's ears); music quality is as good as any other phones out there; build quality and comfort in holding the phone during phone calls are outstanding! even the power button and volume button are curved in a way that pressing them feels good.
among the ok features:
touchpad works well but i wish i could adjust the sensitivity up and down as i wish; camera is not too bad but still not as good as HD2 or E72, but easily miles ahead of milestone while the flash is stronger than nexus one and milestone.
prob:
somehow the 'add word' function for the keyboard is now missing; Handcent seems to repeatedly crash; the phone signal is easily the worst of any of my phones -- for most phones, i can still get signal when i am in the lift for a while right until it starts going down a few levels, but with the legend, even before the lift door closes, the signal is lost.
all in all, my first impression is overwhelmingly good while the flaws are all but insignificant.