I just played my first round after "earning" a Ball Speed Boost.
It makes your ball flight/roll time play at double speed. IMO this feature really detracts from seeing the shot's flight. You hit and wham, it flies lands and rolls to a stop in a flash.
Sucks!
I'm not sure what other "benefit" I get for this earned prize, but it almost made me quit the round (playing alone) and I never quit.
Anyway, the feature is terrible IMO.
Anybody else?