My IS-F is just coming up to its 9th birthday and the warranty was up for renewal. Had a chat with my local dealership (Tunbridge Wells) and as there's nothing on the horizon to replace the F, I wanted to continue its warranty for as long as possible.
To my surprise, I was allowed to purchase 2 lots of warranty at once, covering me for a total of 4 years!
I don't know any other manufacturer that would cover a car for 13 years, let alone one with a 400+hp V8. All for less than £400 a year, whilst including MOT fee's and breakdown cover. For me at least, it's a no brainer for the peace of mind.