I'm going to give my opinion and feedback on this one , Design looks pretty good however when I click on a product I get this :
Oops! An Error Occurred
The server returned a "404 Not Found".
Something is broken. Please let us know what you were doing when this error occurred. We will fix it as soon as possible. Sorry for any inconvenience caused.
Another thing is the prices ,If we take the 50 Euro Steam gift card which should mean it's like 56$ , right ? however on Bitcoin price It says it's "0.1432
BTC" which is 66$ according to preev.com rates .
You should also take in consideration that Steam are now accepting officially accepting Bitcoin (including case keys , skins and everything) so If you really want customers you will have to compete with them (which includes the summer sales) for what comes to the prices.