The roller will need replacing when worn. Wear and tear is not covered by the warranty. You do not need to register for the warranty to be active. If faulty it should be returned to the place of purchase with a receipt within 2 years.
The rollers are made of sandpaper and would eventually require replacing this would depend on use, I would say 3-4 months of continuous use. They are not covered under the guarantee but at £12.99 for a pack of two rollers it is not too bad. Hope this helps JL
I have not checked whether the roller is included under the guarantee. I believe you replace the roller yourself. I tried the product, and it is very effective on my feet, and very sharp. You cannot just keep on using it otherwise your feet will become sore. I found the soles of my feet a bit sore, but after a couple of days, they were okay. It certainly works. It remains to be seen how the product wears, after say a couple of months. I don't need to use it for a good while yet, but so far, so good. Skooter North London