Not too bad but wish refill could be from the top.

I wish the cups were slightly deeper and didn't fill up all the way for two reasons, I feel they will be a bit shallow for adult ducks but work fine and also wish they were taller is also to prevent our ducklings from spraying water everywhere as they drink. I do like the trays for pulling out the wood chips and the cap design is nice to prevent water spillage vs many other waterers I've used. Overall I think this works well so far but if your hope is to prevent ducklings from soaking their bedding this will not be the solution.

Awesome giant size!

Once we were able to get the jug to seat properly with the base this waterer worked pretty well. It seemed that the jug lip was too wide to fit in the groove where sealing rings is. We have 20 chickens and 2 ducks. This waterer kept the ducks from making the water undrinkable for the rest.

I just started to using it this week - the temps are 20 degrees at night and so far, so good. The chickens and ducks are both drinking out of it. It stays much cleaner than a regular heated waterer. I will be ordering a second one.