I come a bit late to the party but fwiw here are my thoughts. It's a very good camera. I bought mine used in 2000. It had been used heavily by a press photographer during three years (since 1997). The internal meter said something like 70,000 actuations. I used it as my main and only camera until 2011. I still use it occasionally and it works flawlessly.
Extremely quick AF esp. with USM/L USM lenses. I'm quite sure that while the V will have a much more advanced AF most users will not need it (that said, I'd love to have a 1V). Press, and sports, photographers might need this functionality. The same goes for the switchable AF points. I always have it set to the middle one. Since my first EOS (an 850 in the late 80s) I have always used the focus and recompose technique. Works for me.
The meter is very accurate. I've seen tests that the Nikon matrix metering is supposed to have an edge over the top EOS cameras but I never suffered from any inadequacies in this respect. I virtually exclusively shot Velvia 50 with mine and always had good exposures. Any errors were always mine.
Weight-wise it isn't very heavy, I find. It's just shy of 900gr with the battery. That's 1.5x the M6TTL. Granted lenses are of course larger and heavier so the comparison stops there. In any event it isn't something that's bothered me. It's a very ergonomical camera with the two dials placed conveniently for the right hand index and thumb. It makes for very swift operation of the functions.
I also have the booster and that transform the camera into a really large box. It's still very nice in the hand, and the vertical trigger is truly useful. But it isn't something I would find a necessary accessory. I just got it for free with the camera. The battery does last a very long times, but as said earlier it is good to bring a spare.
Here's a comparison which probably isn't very helpful:
Flickr