The battery life is rubbish (or at least my iphone is), they are fragile, not waterproof, accuracy isn't great, no clip to put on my belt loops.

You installed that app that makes the iphone waterproof

Totally agree with TJ

Having used a smart phone now and again, they are still not up to the job. This comes back to my idea device - computer + GPS + camera + phone + jukebox - it doesn't exist yet and I think it is still quite a few years away, if nothing else battery life is still pants