For those looking, I would suggest against Birdie Ball. I recently bought a Quintic for myself and can now see that now matter how much loft you deliver on a birdie ball mat you will have a negative launch angle. The birdie ball mats are essentially foam and the ball sinks into them making a positive launch basically impossible. This throws off the balls roll and makes practice on them not worth while. I threw down a putt out mat to compare against and it is much better and much cheaper. I will probably end up ordering a Pro Putt soon.