Here's what I have (well, it's the same style but mine is a Body Glove that I purchased from Walmart but I cannot find it anywhere online):
It's worked well so far. I've dropped my phone a couple of times, once face down and maybe two times on the side and/or corner, and my phone has been protected.
Overall, it adds a little bulk, but nothing like an Otterbox. I can put this into my pants pockets without much issue.