This is a realtively easy build. Simply follow the instructions and it will come together beautifully. I have down a couple of these so far and this one was actually narrower than the plans called for. The lady I built them for wanted the center section to match her cushion width as closely as possible so I simply used one less cedar 1x4. It turned our perfectly.
I have found most of the plans I have built from this site are pretty simple and most of my time has been spent on the finish.