It's really an easy software to learn but doesn't have many of the advanced features some people are looking for (like autorouting). It works great for me and with a few clicks I can get three 2.5"x3.8" boards with silk screen and solder mask delivered for under $85.
I'm working on a beginner's book for this software to help someone get started plus I'll include many tips and tricks.
Check out ExpressPCB at ExpressPCB.com.