I have had defender cases on all my phones, I have been going with other cases but just purchased the Otterbox defender case. I like the security of having this case on the phone and while I do not drop my phone a lot i like the having the security of having it on there. My last two cases the first thing I do is remove the plastic screen protector on it. I do not like the way it sits on the phone and the way that it adds a film to the resolution. I do place a tempered glass protector on the screen to protect the screen so the plastic one that is on the otterbox case is not needed.
I too like the belt clip, it is a nice way to carry the phone and frees up my pockets.