It's a pretty decent tool. The ownership records for private lots is pretty hit or miss in my experience. I use OnX for work a lot as a private woodlot forester. As someone that spends a lot of time in tax commitment books, OnX is spotty. The parcel lines in the app are only as good as the tax maps from which they digitize from. But it gets you the parcel lines in your hands easily and the public land stuff is very spot on.
