The Pentax K10D aims to be the perfect semi-pro D-SLR with some of its great features like a water and dust resistant body, easy to use and straightforward controls, and the best part is that it's extremely simple to get a hang of especially if you have your camera basics in place.
But more on that later, let's start right from the first impressions.
Build
The weight of the camera itself will give you an indication of the amount of hardware it packs in. Even by using a Li-Ion battery instead of the common choice of AA batteries (for D-SLRs), the weight of the camera unit with battery comes to 793 grams.
But the weight is well justified by the kind of features the K10D boasts and the 72 dust and weather resistant seals that the camera's body contains. Not that I would go as far as putting the K10D though extreme conditions, but rest assured, it will stay well protected when shooting in foggy conditions and slight rainfall.
As always, using the K10D requires you to pay attention to the 2.5" LCD screen at the back and the digital display on top that gives you essential information like the exposure settings that the camera is using.
Even the viewfinder has a digital row at the bottom that tells you the cameras exposure settings, so you don't have to keep looking in and out of it.
What I liked about the design is that unlike Canon, the Pentax K10D gives you two separate jog dials to adjust the shutter speed and the aperture size instead of the single dial option that Canon D-SLRs provide.
I bought a K10 in November last year and its the best investment i've made in a long time. I've had the oppertunity to use the canon eos400d and the nikkon D40x and theres simply no comparison. The pentax is definatly the better camera and some of the images i've captured are very nice indeed. The pentax is also the cheapest of the modles mentioned. With the nikon and the canon your simply paying for a brand name that doesn't deliver the goods...! 
URBANEYE