Quote: I still occasionally give them a bowl of water, just because I like to watch them drink.
My experience with nipple waterers was mixed.
They seemed to work great in the winter and all the chickens used them but then in the summer they only drank out of their wading water and forgot about the nipples. When they only had the nipple waterer I lost 4 chickens (they were un-attended for a couple of days, their other water dried up, and apparently they forgot how to use the nipples, (long story)). I'm pretty sure they would rather drink out of a dish or puddle, but the nipples will work with no other water source. Just make sure every chicken knows how!