Bought at a good price. I've had a Dyson DC25 Animal for a few years and have done almost nothing to get it working well. except for the occasional cleaning of the filter and dustbin. Well I recently had to replace a large plastic hose and read some reviews on Revain about replacing the filter. My interest is piqued because the vacuum seems to have normalized over the last few months. but i can hear this annoying screeching, especially when starting. Fast forward to the day I replaced the existing filter with these new ones - and suffice it to say, the squeak is gone. I can't remember when my vacuum cleaner was that quiet. It's amazing (or not!) what a few changes can do! So yes, I'm a fan.