I picked up that case when I bought my phone. I Like it a lot. It comes with a screen protector which works well. I keek my phone in my front pocket but I don't like it floating around in there. The clip keeps it in one place. Also, I like the fact that I keep the screen facing my body so if I accidentally bumb into something I won't crack it. It holds the iPhone nice and tight and looks good too.
I've been using it for a few days now and I'm definitely impressed. If you plan on snapping it in with the backside showing be careful though, because it doesn't fit in as snug. Some people I've talked to have had it slip out sliding it in that way (I haven't had problems yet - but I'm psychotically careful!)