I must admit that I'd never heard of them before and hadn't even got them on my referral tracking system. (P.S. They are on the system now)
So who are they? How long have they been around?
Also at £45.00 for submission their prices are fairly reasonable, but does this represent good value for our marketing pounds?
I think that they are very commercially orientated and giving PPC and affiliate links higher visibility by keeping those links on first pages. There is question, how many visitors get to the pages where other links are.
UK Net Guide been discussed here few times already, try a search.
Max.rk