I particularly like hair colouring products. "Covers up to 100% of your grey". Well.. obviously.. I mean even if you missed your head completely whilst applying it, the statement would still stand.
Most people who tried it, loved it and would buy it and recommend it to a friend and they'd recommend it to their friends it's that awesome!" And in the small print it says according to a survey of 11 people. There just isn't small print small enough to make that kind of claim and keep a straight face.