I used the tape for a while...because it was easy. I glued the front and back with Duco, and I still had some start to move around, and had to do something different. So, I started using Duco along the whole shaft, and don't see myself going back. I took 2 arrows and fletched one with duco, and one with fletch tape. When viewed from the rear, you can visually see more helical on the duco one. I was actually amazed. The glue held the quill down tighter to the shaft allowing the feather to bend around the shaft better than when I used the tape, and if the duco comes loose, it's because something physically moved it.
Just my .02 for what it's worth.