On a scale of 1 to 10 (with 10 being best) they rated each of these criteria.
Distance Control: Each tester rated how much distance control they felt they had.
Alignment: Testers was asked to rate the alignment characteristics of the putter.
Accuracy: Testers rated how accurate each putter was.
Forgiveness: Testers rated how forgiving the putter was.
Sound: Each tester rated how they liked the sound of each putter.
Appearance: Testers rated the appearance of the putter.
Feel: Testers rated the feel of the putter during the putting stroke.
Design: Testers rated the design features of the putter.
Recommend to others: How strongly would they recommend each putter to friends or other golfers.
Overall Rating: The testers took into consideration what is important to them in a putter and gave it an overall rating. (This is not an average of the other criteria).
Overall Average: A final category was added at the request of Golf Illustrated which is the average of the 10 criteria rated by the testers. We feel this average helps to give golfers an indication of how each putter performed taking into account all of the criteria in the test.