Works as advertised. Wish it had option to show numerical values especially degrees of tilt and even the ability to measure one tilt to another tilt angle. Would also be neat if it had the option to look more graphical (like a real level with a bubble would be awesome).

Also, I wish the Y axis had an option to be displayed vertical.

Drop your mac on the floor or throw it up into the air if you want to see the Z spike.