Garmin Approach G5

Build quality: All three units are rugged, with great fit-and-finish. The Garmin gets the nod, because it’s waterproof. The Callaway is water-resistant, and you can purchase a watertight skin for an outrageous $24.99 to protect it further. The SkyCaddie is not recommended for use in the rain.

Size: The Callaway uPro is the smallest and thinnest, about the size of an LG Chocolate phone. The SG3 is similar height and width to the uPro, but much thicker and heavier. The biggest of all is the Garmin, the size of an iPhone and four times as thick. It’s wide, heavy, and not good for the pocket.

Accuracy: The three units properly mapped my home course, agreeing on nearly all distances (within 6 yards of each other) and hazards.