Ball flight technology has come a long way. I do currently use both a Flightscope Xi and a Foresight GC Quad. I only pull out the launch monitor when we want to see the numbers and make changes. This allows me to show the changes in either angle of attack, face angle, club path, etc. can improve ball flight.
But nothing works better than your eyes. A good coach can tell a lot from ball flight from just seeing the shot. I know that the best old school teachers could even tell you the spin numbers by what they saw and once put up next to a launch monitor, they were within a couple of hundred rpms.
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