Just a caution: There is an o-ring on the top of the removeable canister. While you might notice it falling into the trash while emptying, another household member who doesn't have the same love of vacuums might not. Therefore, don't let anyone else use the vacuum but you.
My friend has one, and she knew it would fall off, but her husband didn't. Anyway, she has it taped up now, and has never been able to find a suitable replacement for the o-ring.
If anyone else has had this problem, do you know of a substitute from a different brand that works?