Well indeed we disagree. Yes with lots of experience one can stop that boat on the ball and hold it there. Or pick it up from single handling ..did it many times. My spouse and I don't recall missing a ball for last several years we had the boat..suspect our memory erased failures. However for first few tries..and since it was a screen right handy..seeing 0.1 kts was quite comforting..big difference than 0.5 or 1 kt..which feels much the same. If it helps overcome the biggest error..to hot..why on earth not use it?