Hmm . . .
I know nothing about the site but I'm concerned that they're trading illegally. The law requires all online retailers, trading in the UK, to provide a postal address for returns. This must either be openly displayed on the website or made available to you when you order. Zhefiry's returns policy includes this:
"Please contact us to acquire the return code and the return address". So that means that if you get a faulty product, and they don't reply to your e-mail, you've no way of knowing where they are.
Also, I'm worried about the lack of care taken over the design of the website. The FAQs page is full of grammatical errors such as 'Why my cards is refused by Paypal?' and 'Where our Zhefiry logo located at?'.
The e-mail address given is a GMail one, which seems unusual and possibly designed to hide their identity.
They do give a phone number with a Birmingham code but I wonder what the chances are that it's ever answered (or even if it actually exists). The reason that I've got my doubts about it is because the fax number they give has the code for Driffield in Yorkshire. (How many legitimate firms do you know who've got their phone and their fax machine 120 miles apart?).
The website is registered to Leo Gates of Flat 2 5th floor, Sydenham House, Exeter, Devon EX4 6SX, which is nowhere near either Birmingham or Driffield and certainly doesn't sound like a business address. The contact phone number is a mobile (which must be a rather unusual mobile phone because the same number is given for faxes!).
As stated, I don't really know anything directly about this firm, but I hope I've given the reasons why I wouldn't touch it with the proverbial bargepole.
Chris