Sketchup is the best thing going in drafting and drawing. In my opinion the ease of use puts it over Auto CAD any day. It is so easy to draw up something and check for any errors, get dimensions etc before you even start building. I remember way back in school metal, and woodworking classes, we had to draw something before we could start making it. They said if you can't draw it you can't make it.
If you have plans in SKP format you can orbit around, zoom in, look through, from any angle. Just remember not to save it that way if you want to keep the original. Being new at woodworking I find that helpful. I can take it apart with Sketchup to help me better understand how it is made.
If you are used to AutoCAD there is a bit of a learning curve. Like one fellow said "At first you wonder why it does not work like AutoCAD, then soon you say Thank God it doesn't work like AutoCAD'". The price is very reasonable too (Free).