I have 2 of these types of waterers for chickens. I used them on adults, they took to them fairly quickly and all went well.
My only issue with it was that when recycling the 2 liter bottle, they are now a much thinner plastic than before and it creates an issue with using the nipple system. As the water level decreases in the bottle the bottle starts to crush inwards and over time the bottle develops cracks. I have tried several different brands of soft drink bottles and the same has happened on each type.
The design of the system works great, no wet bedding, and plenty of water for a couple of birds(you will have to refill a couple times a day in the warmer months).
If I were to use this type of system again I would try to find something larger, dog size of a rigid plastic.