Does it include all repairs, or is it just service items?
I'm wondering if the 4 yrs of cover effectively gets you a 4th years warranty (which presumeably costs quite a bit) or not?
Make sure the price includes VAT!
I checked the price for my car (C270CDi for 30K miles/year for 3 yrs) and they wanted £115 (then told me +VAT, so £135) for service only, no tyres. It nearly put me off buying the car! I didn't go for it, and as it happens, my mileage has been less that I expected.
OTOH, my for my daughter's new Ibiza, 12k/yr for 3 yrs, all service, maint and tyres was £20/mth! Think I'm selling my Merc and buying a SEAT!