I've had it since Christmas. Bought it for hiking in Snowdonia, got through 5 days of that in (mostly) pouring rain, all the wet riding I've done this year, plus more hiking and camping etc.
I'm not kind to things like this and it's still pretty much mint condition.
I've been using the same ziplock for 5 years or some shit now. The bottom is gone so I just leave it zipped and drop the phone in the other end, then fold :)
It's going to tear soon so maybe I could use this as a replacement.
Looks interesting. How long have you had it? Durable?