Received mine today and to be honest it's pretty useless. Very tight and appears to leave almost 1cm overhanging, so no way I will be using it.
Ordered one of the those silicone ones about 30 minutes after receving it at £1.49 including delivery from here
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=180499326258. Had a look through a fair few and they all appeared to be the same design just at varying prices (if you look at some of the other closer pics it has the button imprints like the rest).