Consumer group Which? have warned that some of the products they have tested and given a “Dont buy” rating to have scored very highly in customer reviews posted by retailers that sell the products.

Examples are:

•  AfterShokz Trekz Titanium headphones that scored a low 28% with Which? – owing to “low battery life” and “awful sound” – were nevertheless given an average rating of 4.2 stars by Amazon and 4.7 by Argos.
•  The Black and Decker SVJ520BFS 2 in 1 Dust Buster scored a low 32% with Which? – where it was deemed “awful at cleaning carpets” – but was given 3.8 stars by Amazon and 4.6 stars by Argos.
•  The Nikon Coolpix A10 camera scored 34% with Which? – for its “slow start up time” and “poor image stabilisation” – but was given 4.5 stars at Currys PC World and 4.6 at Argos.

Worth checking with Which? before you buy?