For some reason (warm weather?) half doors have been covered a lot recently.
Here's one thread worth reading.
But do a search for half doors and read thru.
-Pluses are lightweight, easy to stow, great for flexibility (half, full, no door options), I get a commission when you buy them (kidding!).
-Minuses are cost, wind noise, less protection than steel doors.
Also recommend searching for Element Doors, or go to our web site (bestop.com) and read up on them. They're tube doors, but they have kits that turn them into nice half doors.