The venerable Defender is still the only case out there that I’d feel comfortable chucking my phone across a parking lot in. However, I’ve always had trouble with them scratching the phone inside the case. I bought and used the Defender for my Silver X, and sadly it did leave some small scratches on the silver band near the middle of the phone. So no more Defenders for me.
Another con is the thickness and “creakiness” of the case. It really is a big rubber chunk.
I switched to the Lifeproof Next case, which is better sealed against dust, and still feels very protective. The Otterbox Pursuit looks great too...and the Lifeproof Fré oughta be the bomb-when they release it.
I’d skip the Defender.