No false readings, no batteries to change, and it actually worth on plaster lathe! It's so simple, it's a little embarrassing that it took me so long to find this tool. You'll need some string or dental floss to make it work, and I suppose I could deduct a star for not including that in the package, but I'm too happy with the results. A short length of fishing line, and I'm good to go.
Rating:
[5 of 5 Stars!]