I bought this armband for the low price expecting the quality to be somewhat less than a more expensive option. I honestly was not too surprised with what I received. The product arrived intact, on time, and was as described. The arm band serves its purpose, but there are several drawbacks.
1 - Short strap length
I am an average sized male and I found that I could just barely squeeze my arm into this armband with the strap almost all the way undone. The tightness cut off circulation any time I moved my arm at all. The strap honestly needs to be longer.
2 - Lack of elastic in the band.
Even with adding length to the band you still run into a problem any time you try to exercise using your arms. A length that is comfortable with your arm relaxed is too tight when you flex your arm. The same goes that if you have the band set to a length that is comfortable with your arm flexed the moment you relax your arm the whole thing slides down your arm. I was able to fix this by purchasing an elastic band and attaching that to the product.
3 - Poor construction materials
I have had this armband for about a month and am fairly careful with it. However the black plastic that retains the iPod is already torn off in each of the four corners. The armband is still able to retain the iPod, though less securely, and more strain is being put on the remaining plastic. It would not surprise me if the remaining platic were to tear soon as well.
For the price this armband works provided two conditions apply:
1) All you will be using it for is running and 2) You have smaller arms.
If you intend to be doing any upper body exercises or you have average to larger sized arms it might be better to look into a different armband.