Found this armband to be very durable. The quality of the material is excellent. The first run and went out on the weather was dreadful so this was to be the first test of the band for me. It held out well and there were signs of any leaks or faults with it in that departement HOWEVER...the only slight hitch (the reason for 4 stars instead of 5) is that the velcro elastic does undo itself farely easy at points but that is rare. Overall a very well made product which I'm happy with.
Top is just a cut, so not an issue with headphones lining up. Case is large enough to hold my HTC Evo 4G in a silicone case. Slightly tight fit, but it works. The armband isn't super fancy but for the price, it's plenty functional. Looking forward to being able to run with my phone again.
Edit: After only 3 months of use, the Velcro is getting very loose and will no longer hold closed. I'd happily pay triple price for something with quality Velcro that wouldn't wear out so quickly. Dropping from 5 to 3 stars for that.