I love my 70-200. I'd probably make a little bed for it to sleep right next to me if my DH didn't think I'm nuts.

(that was a joke...)
Honestly, it's my go-to lens. I use it all.the.time.
Personally, I LOVE the vignetting. It's my favorite feature of the lens and I would cry if it went away.
While it has a fast aperture, sometimes it's slow to focus and sometimes it will search for focus... but unless you are shooting professionally, I doubt it's something the regular shooter would notice, honestly. And finding contrast in your scene really helps with that issue.
I know that I can hand-hold the lens down to about 1/20 shutter - I've heard that is much lower than most people can though. But I have extremely steady hands and don't have much issue with camera shake.
The compression is to die for and the bokeh is g.o.r.g.e.o.u.s.
The cons... it's heavy. With the 70-200, D3 and an SB-800 all loaded up, it can weigh in close to 9 pounds. I'm used to it now so it doesn't phase me, but that is the biggest complaint I hear from people. It can put a lot of stress on you hands/arms (and neck, but I have a hand strap, so I don't deal with the neck pain).
Honestly... if you can find one used and in good condition... pick it up. They are hard and they hold their value really well.