Thanks, was finally able to see one (and buy one) yesterday at Best Buy.
In the end you are right, it is not much bigger than the CaseMate Carbon Fiber Case that I ended up getting last week at the ATT store (without the belt clip), so it does fit in my pants pocket when needed. And the built-in screen protector is very nice - no watermarking here.
If I have a complaint about the Defender, it is only that it is I find it very hard to open up the hard plastic case to remove the iPhone 4. Which can be a good thing or a bad thing.
The good of it is that the hard plastic shell should protect the iPhone 4 very well from the case popping open - even with the rubber cover on it - providing extra protection. The bad of it is that it makes it tough if one needs/wants to remove the iPhone 4 from the Defender case.
For me the reason to remove the iPhone 4 easily from a case would be to use
some of the currently available tripod adapters or GPS adapters with connectors. On the vain/fun side is to be able to show off the iPhone 4 with a fun custom skin like the Leica like iP4 image shared in another thread with a Griffin case.
But within hours of buying the Otterbox Defender and getting it installed, I found out that it is worth its weight in gold IMO. And learned a lesson on the belt clip as well. Thought I had secured the Defender protected iPhone to the belt clip, and went out and about doing some sightseeing. On my return to the hotel, I was leaving the shuttle bus with noise isolating earbuds attached listening to some tunes. All of a sudden there was dead silence in my earbuds.
Looked down and the earbud jack was hanging free at my feet. My heart sank. Turned around and the bellman was just getting up from picking up my just a week and half old iPhone 4 from the asphalt. Quick check of the Defender case showed no damage what so ever. And EVERYTHING on the iPhone 4 worked like the day it was new!
Now for a tip on the use of the belt clip - just be sure that you hear a good solid click to be sure that the case is securely in place....
Any chance that you bump the holster release into something?