The price has gone up a but, it was 700 and something for 3 years for my K16 in April. The service for my K13 was £220, including the final drive oil change. I didn’t get a service plan for that, because it’s too old and I only manage about 2.5k a year. Apparently service plans do include the valve check at 18k as long as you’ve done the mileage, so still a good deal. The only way to really lose seems to be if the bike is written off; the service plan is linked to the bike, so won’t transfer to a replacement.