The technology behind launch monitors means that they can only measure a couple of variables and then they calculate the rest of them. These calculations are based off of formulas that may or may not be accurate for a given set of conditions, and can lead you down a very wrong path.
Though they can be good for comparing launch angles and spin rates from one setup to another - they will rarely give you the same numbers from one machine to another, and will often lead you astray chasing your tail trying to fit optimum on a golfer who cannot swing the same way one club to another.
That is exactly how I took the results of two recent Launch Monitor sessions.
I did not get hung up on how far the LM said the balls I was hitting would actally have traveled, what was valuable was hitting the various combinations and seeing the difference between the two in clubspeed, launch angle, back spin and so on.
The actual total distance computed is relative and really meant nothing to me hitting into a net. What's important is that over two sessions and 9-10 different driver/shaft/ball combinations using the
same LM with the same settings I know the numbers are consistent and I can believe that the driver I chose hit the ball with more clubspeed, at a better launch angle, with a better backspin number and so on then all the others.
It's the difference between the clubs that matters. The key is to start with a driver you have hit before and go from there.