I have a couple of Fly Traps which I have also used for about 15 years and have been very happy with them. Recently, I wanted a third fly patch and went with the C&F. It has worked well, but I have only been using it for 6 months.
The only problem I have encountered with these two products is storing large deerhair flies. While their ability to enclose the flies and allow them to dry is a big plus for me, the lids limit the height of the flies that can be stowed.