Mike, I'd basically repeat what Trevor has to say about the lens.
I upgraded to this from the kit lens and now it's my primary lens. I have found the f2.8 very useful for indoor work, although this makes the lens quite a bit larger and heavier than the original kit zoom, but I don't find this to be an issue.
So far, the only thing I have found is that it would have been nice to go to 70mm (as per the Sigma, but then you lose the constant f2.
, but let's face it, you could always do with more!
Bottom line, I like mine, it's always on my camera and it was a noticeable step up from the kit lens.
Dent, Arthur Dent.
Pentax k-30 and k-x with DAL 18-55mm and DAL 55-300mm, Tamron 18-50mm and Camera Labs Straps.....hang on, where's my towel?