I'm using Warbirds exclusively and have been for 8 months or so.

Driving from the tee consistently seems straighter and farther vs when I change balls for sake of change. The Bird is definately hard and makes a lot of noise off the driver face. Price isn't bad either at about $15/doz (Nevada Bobs).

The ball does seem to hold together well, no tearing or cutting from my experience.

Like others, I suspect it is a rebadged Top-Flite...but it's working for me at this point, no reason to change it.