Pros - Fairly cheap
Cons - Algae and bacteria factory
Cheap waterer that will work. Drawbacks are that it is an Algae and bacteria factory. It also attracts mosquitos, which lay their eggs and produces a mosquito factory, too!
Needs to be cleaned very regularly and it's time consuming.
Other than that, it's a waterer that will get the job done.
Pros - Cheap / low dollar
Cons - Leaks, water doesn't flow
I would spend the extra money for a better waterer.
The water sometimes doesn't flow freely. You end up having to tip the waterer every couple days or so to refill the water basin at the bottom. If you don't tighten the water tray properly, you will end up with 3 gallons of water either in the coop or all over your feet.
Pros - won't rust
Cons - the design is too heavy for very cheap hardware provided
Even without adding water to this, we could not use it because there were little fastner pieces missing. We used some things we had around garage. The water makes it very heavy and the metal rod broke right away. The water doesn't come out well, or we could have used it on the ground. But the reason we bought it was to prevent them from getting into the base.