I use Pawpaw markers and a Brother PC 2430 and LOVE it! I have had problems with paint pens, blind markers, etc.
I tried using a map but I am bad about squeezing a new one in here and there. So the marker is best for me.
I have been trying to make my markers first before planting. Before I would think I would remember what was planted where but I would be forgetful and have to wait until bloom time again