I use the one that came with my Ottorbox Commuter case and glad I do. The other night I was playing basketball and had my phone in my hat and threw my keys in as well. The keys hit the screen just right and poked two holes in the screen protector, hopefully the screen underneath is undamaged. I order some Steinheil Ultra off of Amazon and they should be here in a few days for replacement.
You're in for a nice change. I went from the same Commuter screen to the Steinheil Ultra Fine and love it. No glare or fingerprints, like I mentioned in my earlier post, and it's got a very smooth feel to it. Not at all like the Zagg I have on an iPod, which has a gripping feel.
I think you'll really like it. Assuming you're getting the Fine in the Ultra series, but I've heard good reports about them all.