Nice method for repeatable results.
So far I haven't heard of any negatives on the pivot fence, although most pictures of router tables, either DIY or store bought are of the sliding fence design. The only real advantage that I see for the sliding fence is for a series of dadoes on a a large panel.
What got me first interested in the pivot fence was a chapter on router tables in the book, "Fine WoodWorking on Woodworking Machines". The chapter was by Wallace Kunkel. It was a pretty neat pivot design, but the fence could be moved out of the pivot location easily. The only thing that I didn't like about it was that the fence went from opposite corners on the diagonal. This would leave the operator to maneuver around the corner of the table as the work was being fed through the bit.