Have this Carefree Box bought alone the guarantee of 2 shall be extended to 5 years and for a good price. Have registered at Miele, is very simple. At Miele 5years guaranteed total would cost 109.00. The bags we have not used so I can not yet say, except what Miele brings to the market is super quality. We have but before new vacuum cleaner Miele S 8390 bought at Amazon made clever on the website of Miele. This has then convinced us to buy.