Back when they first came out, one of our actually good bowlers (bowled on tour for a while good) got one. He was averaging about 215 at the time.
Ball would read earlier than anything had a right to, burn up in the mids, and sometimes not even make it back to the pocket.
And when it did, it hit like a marshmallow. Almost.
He bowled with it for several weeks before finally giving up on it. Dont think he EVER broke 200 with it.
And to top it off, its the only one I ever saw used. Everybody else that got one gave up on it so quick that it was history by the time travel league rolled around again.