The first thing that is terrible its the interface. Its too busy, too scattered and simply not upto to the same overall standards of the Jobcentre website. It certainly isnt user-friendly or appealing on the eye.
The general search options arnt exactly inspiring, they are lacking to say the least.
And the killer for me is the amount of jobs available on there at present. Theres simply not enough.
I think the Jobcentre website provides pretty much everything a person can want from a job search website, and dont really see the need for others. Others really only exist to make money for investors.