Residence Inn by Marriott Frederick

This caddy on your wrist knows distances for over 42,000 courses. We doubt that Bones Mackay can even claim to have that much knowledge. And the Approach S12 is a bit cheaper than hiring Bones.

If you're not already using a rangefinder on the course, you're probably not hitting as many greens as you could. This highly-rated model gets the job done at a reasonable price.