That case is interesting, Greg.
I thought "looks like an otterbox ripoff" and "geez, it looks even bulkier than my otterbox". Lisa wandered by and I showed her. She said "it looks a bit mannish."
I showed her because we were just in the kitchen minutes ago and I told her she needs to look at otterbox colors cause I ordered her an iphone 4 last night.
She wants to look at some different cases aside from the otterbox, as well. Not because she doesn't love the otterbox, but she just wanted to see what's new out there. I don't think Ballistic will get the nod.

After seeing the $29.99 pricetag compared to the $49.95 pricetag of the Defender, I can see where Ballistic could carve out a good audience. It appears to be the same thing at about half the price.
I wouldn't go with Ballistic, just because of brand loyalty. The Otterbox has saved my phones countless times and kept them in pristine condition for resale. If I got a Ballistic and broke my phone, I'd feel like an idiot, ya know?
What I'll say now, after looking them over, is "Had I never met Otterbox, I'd certainly have one".
I wish I could check one out and compare it to Otterbox, side by side, to see if the extra 20 bucks Otterbox charges is warranted.