Trustpilot - rating the reliability of the companies you buy from

Trustpilot, says their website  "makes it easy for you to assess the reliability of a company you're considering purchasing from". 

Put simply it's a singel place to go and rate and read reviews on how (generally better known businsses ply their trade). I've had a quick whizz around - all seesm pretty sound. 

HoL favourite Virgin Media doesn't do so well:

Anyone used it?