I bought a used 1V back in 2008 when my requirements exceeded the capabilities of my trusty 500N, and it's absolutely brilliant. In fact it's hard to go back to using my digital EOS 40D afterwards... The 'special' things I like the most about it are the super-fast, super-quiet autofocus system, the incredible build quality, and the lovely sound of the shutter (I know, this isn't really a feature, but it's nice!). I often shoot in poor, rainy weather, and occasionally in extreme temperatures, so the fact that it is durable and weather-sealed is a real positive for me. Not that other cameras won't work in these conditions - I used both my old 500N and also my Digital Rebel in -30 degree C conditions... but the 1V is built for it...