1. I shoot 500+ pictures with 20mm lens. I shoot mostly in P or A modes. Even in the daylight focusing on person's face is an issue. In 2-5 pictures, faces come out blurry. It seems that kit lens recognices faces from the longer distance. For 20mm lens face recognition max. distance is 10 feet. Pictures w/o people come out incredibly sharp and detailed. 2. In any mode if the lens can't autofocus it will freeze the camera, the only way to reboot it is to take the battery out. It happened 4 times in the daylight. I like the lens and I can live with issue #2 and slow non-dslr autofocusing speed, but taking picutres of people is what I need this lens for. I believe there is no better prime lens on the market now.