They are more miss then hit in my personal experience, but I bought through their website rather than eBay.
Hopefully when you buy through eBay you have more protection because dealing with this company is a pure nightmare when stuff goes wrong.
Oh and dont expect your refurbs to be apple or lenovo grade refurbs, likely they will have been visibly worn and abused (expect scratches/imperfections to be covered up with d-brand skin look-alikes)..