Depends on where you hit the pitch. If it is out in front where the bat head can actually "Whip" then it has a nice effect. If you hit the ball back further where the bat head is still flexed and does not have time to "Whip" then it stinks. A batter that pulls the ball most of the time will like it but those that hit the ball to all fields will not always get the results they are looking for.
let me clarify/correct my point. If you are a batter that hits the ball later in the swing plane, when the bat head is still flexed, you will not like the performance. With a stiff handle bat, where the walls flex, even hitting it late in the swing plane will cause good wall trampoline flex.