My seven-month backorder finally arrived a few weeks ago, and it was worth the wait!
It is a very well-crafted lens, quite heavy though, which is the only drawback I've seen so far. It works great on my K-30. Now I am no longer going to use my kit lenses at all--this and my Pentax DA 55-300 4/5.8 zoom are the two lenses I will carry. So far the pictures the 18-35 takes are fantastic. I have not experienced any of the front/back focus issues the other camera bodies have been complaining about, only time will tell. I will be entering some of my compositions in the local fairs, gonna pull in big bucks with those $5 blue ribbon prizes!