They make some great value for money products but with that range it will be hard to think it will be good at all focal ranges, and a lot to invest if you ever change to another camera with the different sensor.. The digital lenses may give way to the larger full frame formats in due course in my opinion

Danny O'Byrne  http://www.digitalartzone.co.uk/

"All the technique in the world doesn't compensate for the inability to notice" Eliott Erwitt