Over the past 15 years, we have been using National tyres and have replaced all our tyres with them. Keeping business local is something we take pride in doing. This is particularly relevant to my recent car, which has had 10 tyres replaced within 58k miles (£110 per tyre so a reasonable investment). Our most recent experience suggests, however, that customer retention is not at the heart of the organisation, and they are only interested in making money. As a rule, I have purchased a tyre guarantee and have used it when I experienced a slow puncture. This time on a tyre with 4.5/5mm tread left, so it was a good tyre still. The puncture was on the edge of the wall and could not be repaired. I had anticipated that the tyre would need to be replaced at this point but glad I had the guarantee, so I thought! However to find that in fact the guarantee will only cover 40% of the cost as it is worn was sort of understanable, however then being told it would cost me £110 to replace under the guarantee, when I had only paid £104 for the Bridgestone tyres, left me somewhat surprised. Being told the price is not based on what you paid, but the cost of the list price of the tyre. Therefore, I decided to ask if the cost of replacing the 2 front tyres could be a way of a contribution being used; I was informed that the deal would be based on the internet price( As they cant discount in store tyres lower than the internet). Wow a company that competes with itself.. Therefore, I would lose my 40% contribution, and so in theory I have no guarantee and so just wasted my money. In my opinion, I would not bother purchasing the tyre guarantee service, since it is not worth the paper on which it is printed. In my opinion, you should save your money and go to a different retailer because a tyre is a tyre, and until recently, it was the customer service that had me returning, but now that has been lost... Well done, National Tyres..