Summary: I like this camera so far. It is big improvement over the k10''s I have been using for a long time. Buttons are easy to access and use and I feel like I can adjust the settings faster. I have small hands and it fits my hands well and is easy to hold. I use a battery grip and it is well balanced. I am happy with it for the price.
Excerpt: I was glad on one hand that I'd passed on the K-20D for the K-7, but on the other hand hugely disappointed when the K-5 rolled out 5 months after I got my K-7. Most impressive about the K-7 and the K-5 as well, is the very nice & compact magnesium body, that Pentax put forth a very good design in its feel and ergonomics. The camera has an incredible feel in your hands.
Summary: Thought I'm a beginner in photography, I choose this one cause my favourite field is the sea. And taking pictures on a small boat and big seas is quite dangerous for any kind of electronic devices. One drop of salt inside, and corrosion makes its way... The 18-55 and the 55-300 give me all the latitude I need to shot in seas, more over, the 55-300 is also flewible enough to be used for quite close-range shots.
Summary: I struggled for a long time before getting this camera over the Nikon D90. The primary reason is that this camera for me is "free" - from awards points. But when I received the camera in mail, I was complete surprised by how well this camera was constructed. Compare with Nikon D90, this fells SOLID! As for the weather resistance feature, I was very surprised as well. That, also, was so thoughtful and well constructed.
Excerpt: The only bad things I can say about the k-7 are the standards; lack of high ISO performance and weak dynamic range, the latter being the most frustrating at times. I shoot mostly back country wilderness-scapes here in Wyoming and have found that my more complex images have a crammed look to them. Most pictures turn out great but things like canyons that have tons of competing details tend to get flattened.