Pros: easy to fill, can add ACV, wide trough makes it easier for crested breeds to drink
Cons: little heavy to carry any distance, short cord
I have 3 of these. They are all placed on cinder blocks against a wall. Have never had any trouble with any of them leaking or with chickens dirtying them. I remove the entire bottom to fill then attach the bottom and flip it. I even have one in a covered outdoor run with just a bale of straw to block the west wind and it stayed thawed at near 0*F. Barring any electrical malfunction I anticipate these lasting a good long time.