Excellent value for$$$
Value for money for a kit lens, this is about as good as it gets.
Very sharp in the centre, even to 300mm. Have taken some very nice bird shots and the colour rendition is very true.
Bit of fall of to the edges, which for wildlife and portraits is generally fine or even an advantage.
It would take a very nice lens to bump this out of my aps-c camera bag, but that lens would also be hell of an expensive piece of kit.
Highly recommended and if your buying a Pentax kit, a no brainer.
Auto focus a bit noisy, but what are you expecting for the price........