I use it...it's great! It's great when you have several blocks with the same design, so you can stack them up and sew thru one layer without thread to make the holes, then you pin to the block and follow the pattern with the thread. It's very easy. I always use crayola washable markers to draw my designs on the first layer, then I don't have to worry about them transferring onto the quilt.
I came across a great video link on recently that showed an easy way to space out the borders.
http://pinterest.com/pin/118641771403917734/