The one issue with the k-x is that it does not show you where it focuses. Nearly all Pentax dSLRs light up the focus point in the viewfinder - but not the k-x. That could throw off a first time user as it may focus precisely on something you don't care about.
The best solution for most users is to set the camera up so it only focuses with the center point; generally that one is the most accurate, and once focus is found you hold the shutter button down !slightly! and then point the camera for best composition. Easy with practice, and you will be certain of what's in focus
and change it later when you are more familiar with the camera.
If you see a k-r at a similar price grab that and the focus points will light up..but I found the k-x was more comfortable in my hands. It's smaller rounder and ..cuter than the boxy k-r even though size & weight are really similar. Obviously I still miss my k-x now and then!