Durability has not been an issue for the simplified version that I use, and this one looks about the same. It's such a quick tie, that I try to carry a bunch.
The flies don't fall apart, but they do stop floating after several fish. If I'm down to my last one, I spend a lot of time refreshing after each fish. I wash it thoroughly, blot dry and use a double dip of desiccant powder. The CDC back will fray quite a bit, but the fish will still eat it.