Rokform Rokbed Roks!
I've had mine on the phone for about a week now. I absolutely love it. Instead of going with the expensive titanium version, I got the Rokbed V3. Since having it on the phone, I've dropped it about 3 times and it has worked perfectly. I ordered the optional magnet insert and it works well, so long as you put it on a clean metal surface. The online video shows it being attached to things like a rear axle of a car, but I'm not so sure that would work. I've found the phone spins a little, eventually turning upside down. This is probably due to the weight of the phone and the magnet being in the lower third of the case. Otherwise, I have zero complaints. The RMS, or remote mounting system, is very good. It mounts tight and in various positions. I'm going to wait and see how long the 3M tape holds up after being exposed to high temps in my truck, but for now it is solid.
If you're debating on buying the case, I recommend it highly. It has a very unique look and the supplied lanyard is much more useful than I expected. As for screen protectors - I don't use any, but I'm thinking of getting a front one. I'm finding dust collecting around the screen edges where the plastic case meets the screen. I just don't want to degrade the screen's amazing eye appeal.