This isn't the same set as the £14.99 B&M one which uses batteries and is just a figure of 8. This is a 4.9m track length with a 360 degree loop and is mains operated with a transformer so no need to take the batteries out of the smoke alarm!
Comes with 2 hand controllers, mains transformer, Mario kart, Luigi kart, a flyover and a lap counter as well. Great reviews 4.7 out of 5. Kids and big kids alike would like Father Christmas to bring this for them ;)
Currently £55.95 on Amazon and £59.99 at Toys R Us.