I primarily build bamboo backed osage bows and the moisyure meter has been critical to producing faster, low set bows. Without it I'm just guessing, but with it I can be sure of my moisture. I use it in conjunction with a drying box to dial in the moisture to my needs(9-10%). Great tool! Take a look at your local woodworking stores and get some advice from the experts before you buy one to make sure you get the right one for your needs. Happy bowbuilding!
Matt