For the price, it's a great addition. The cyclone top does not make a real seal with the top of your 5-gallon bucket. I took the rubber seal out from my bucket lid and glued it around the lip of the top with some silicone caulk so that it forms a press-fit seal when I push it down on the bucket. This makes a good seal, but the top is still not terribly secure, so good idea--as others have said--to wrap a bungee or web strap around the bucket to hold this in place.