I bought these a couple of years ago, used them a few times, then put them in the back of a wardrobe because I found them quite fiddly and annoying to use. I got them out recently to store some duvets and they were just as annoying. The sliding clip keeps coming off, so it's hard to close the seal & it's quite difficult to make sure the seal is closed along its whole length (even once it's closed it can pop open which is even more annoying) I finally got it sealed and vac'd the air out but within 24 hours, the bags had inflated. Waste of time, money and space. I will never use or buy again.