Pointless purchase, but at least it was only a few pounds. The buttons on the outside (which click down onto the volume and lock buttons) fell off after only a couple of days, which meant I had to use my nail to use those buttons.
Bought a different one (rocketfish) after less than a week and that seems to be working well so far, though it's only been a couple of days.
Bottom line - this may be cheap, but what's the point of wasting even a couple of pounds when the product falls apart in less than a week.