The only problem - giving the camera to someone else to take a photo! Otherwise it's invaluable
I didn't even think of that. Yes, I'll have to quickly switch over before handing off to someone else to shoot. I don't trust too many people with my DSLR though. But still, you would not believe the number of people that own AF cameras (point-n-shoot) that don't understand about holding the shutter down half-way. Those are usually the people that ask, "Do you know how I can get my camera to make sharper pictures?"