Personally, I don't like full fenders, I have a pair Planet Bike Cascades (I think that was the model) that was on a vintage touring bike I had and they were a nuisance to keep adjusted; roads where I live are rough and after banging around for about a week, I would have to make minor adjustments to keep the fenders from hitting the tires, and that involved loosening the bolts readjust the rods both front and rear connectors on each fender on both sides, and tighten them back up again, sometimes I had to bend the metal rods a bit because somehow they would get bent just a bit, it was a real pain. Plus, they were noisy.
So, on my new touring I decided to try Topeak TX (again not sure of the model since there is no model name on them), these are half or maybe 3/4 full fenders, and they work just as good as the full fenders did at keeping crud off the frame and off of me. Plus, Topeak uses a latch system that you unlatch, slide the rail to adjust the fender and relatch, and there is only one rail latch to adjust on each side of the fender unlike the two on each side of the Planet Bike fender, easy, while it still comes unadjusted after about a week or two of riding it's fast and easy to adjust back without tools. These fenders are also a lot quieter than the Planet Bike ones were. Some people who I know that have these fenders cut out a 3 or 4-inch tab to make a flap from a milk carton and screwed/bolt it on to the end of the fenders, I have not found that to be necessary.