I have 3 moonphase watches i.e.
JLC Master Moon, Glashutte Original Perpetual Calendar & Omega Speedmaster Moonphase. (last one was sold recently)
I like to make sure the mp is set correctly. Its quite easy. Set the moonphase at its full moon and advance by the number of days that the current date is after the last full moon date using the chart.
Its nice to look at...