Had the 26L for 9yrs now. It's an arm saver, especially when trying to tire out a high energy Labrador Retriever pup. I use the orange colored ultra ball during the day, and the glow in the dark one at dusk or night. Eventually, every good human gets great at throwing the ball with differing techniques ... from the high, arching lob with serious hang-time, to the side arm line drive water skipper; and not to be outdone by the over the dogs shoulder one-bouncer mid-air catch (just like an NFL QB to a wide receiver).