Wilson, a two-time winner on the PGA Tour, has a magnificent tempo to his stroke, and he just so happens to putt with his left hand low. I don’t think this is a coincidence. Let me explain. When you putt left-hand low, it naturally forces more weight onto your front foot, providing better stability. It also helps square your shoulders at address so the putterhead travels more down the line through the stroke, instead of cutting across the ball. You almost never see a left-hand low putter with their shoulders open. What I also like about this technique is that it promotes a steadier head throughout the stroke and puts more forward lean on the shaft, so the ball rolls truer (end over end) coming off the face.
Do I recommend that everyone switch to left-hand low? No. You've got to go with what gives you the best results. But before you switch to a belly putter or long putter make sure you try this method first. Players with good technique generally have outstanding tempo, and putting left-hand low promotes the proper technique.