I've been on vacation for a couple of weeks with my K-1 and the 28-105mm lens. I am carrying two primes I haven't used as I find the travel zoom is doing great, exceeding my expectations.
I'm loving the K-1! Solid, easy to handle, lots of control. Overall a pleasure to take everywhere. Even the top dial has been useful as I am experimenting with HDR modes and toggling WiFi to quickly post some shots from my tablet.
The results hopefully speak for themselves: Select shots are on my Instagram feed for now, these are not final images. Still would welcome everyone's reactions, and happy to discuss further.
https://www.instagram.com/aridublyu/