I have a crazy lab mix that is obsessed with tennis balls. We had a smaller version of the Chuckit, which worked great until we lost it. We recently replaced it with a larger version and BOY can this one really launch my balls!! Its great cuz now that she's gotten older she's faster at chasing them down. I really like how it is sized for tennis balls too because my balls are constantly getting destroyed. But, ahh, such is life...