Price comparison sites in UK

Price comparison sites UK - there are wide option for online buyers to have price comparison and to select the products effectively. Find the review of below sites which provides the best comparison feeds in UK.
Site Review
www.kelkoo.co.uk Kelkoo is constanly scouring market which provides best offers and deals for buyers online.Baby&Nursery,Computer,Electronics,Beauty products ,Home appliances,TV,DVD,Pharmacy etc.. are avialable here
www.pricerunner.co.uk Popular site in UK for online comparison.offers wide space of sellers price feeds on different products
www.lastminute.com Provides option for Price comparison for different flights,hotels,resturants ..etc
www.ciao.co.uk WebSite provides option to compare prices of Books,Cameras,electronics items,gadgets,House hold etc..
www.uswitch.com This is one of the best site which provides unique option for compare deals of different providers broadband plans, switch Gas&Electricity..etc.
Google Products,Amazon Google product search,Amazon provides wide options for price comparison