A friend has one from
here and it works very well (he was lucky to get one bar before)
That company is not replying to emails, or taking calls (ansafone).
The same product is
here but at 2x the price. Curious!
I guess everybody is playing tricks because these boxes are clearly illegal to use in the UK.
Having just picked up a customer with a Vodafone Suresignal box, I can confirm they work well when they're working.
A friend has one too and it works, but he seems to use it just to support his Voda Iphone. Unfortunately most private individuals are not on Voda.