I had it for 2 years but as much as I love meters its kind of like having a speedometer on your bike, if it feels to fast, then it is and if it doesnt then speed up until it does. Unless someone has a certified meter, it means nada.
Drying for me is super important. Totally different with the change of season! Winter low humidity, this time of year especially now with all the rain on the east coast this round has seen plants take as long as 10 days to dry and a dehumidifier in use to keep things at 65%.
A good cure for me is roughly 3weeks with humidity at about the same as for drying and temps around 65.