Well, to start with - they have all cheapy products.
On top of that, they do not even have buy it now option on auctions.
All in all, they simply boost about their so called 'certifications' and take your money.
Penny auctions are hard to trust. I've won 2 items on bidhere.com, and they delivered it, but I am still very careful of penny auctions. Sites like bidhere.com at least have buy it now on all auctions, thats a deal maker for me, personally.