Rate It: Best care for coloured hair

Now, this is not an entirely altruistic post. I'm having a feckin' divil of a time altogether keeping my red locks from fading completely, despite my bathroom being littered with all manner of so-called colour protect shampoos and conditioners.

Colour protect, me ars- ehem, arm.

So whether you're a blonde, a brunette, a redhead, or Lily Allen, tell me this and tell me no more: what products for coloured hair do you reckon actually do what they say on the tin?