I just bought the simple, non-multi zone watch.
Several years ago, when I traveled more and was doing business regularly on 4 continents, I think I would have had more use for the multi-zone functions. However, I like the look of the classic model better, and I rarely deal with folks from out of the country any more, so the simpler watch seemed like the better choice right now.
I actually had the very same Patek travel time model that was pointed out for sale on ebay. I recently sold it. It was a beautiful watch, but the problem with it is that the buttons that move the hour hand back and forth gets pressed during normal wear, so the hour hand is often inadvertently moved without your knowing it. After several occurances where my watch was off by an hour or two because of this, I decided that it doesn't really function all that well as a multi time zone watch.