The Bosch people were a Dog & Pony show at our local Home Despot. Free donuts and coffee (the parking lot was full of cop cars). A very sharp demonstrator answered all my questions and I bought the Bosch Laser Tape.
That thing is a real laser measuring device, not to be confused with those sonic ones with laser pointers built in. For a countertop guy, it is handier than a pocket on a shirt. And dead- nuts within 1/16" I checked it out against my 100 foot chain ( yes, temp compensation applied) and my 25-foot Fat Max...right on the money. Reads out in ft-in, ft-decimal and metric. It does sq-ft calculations based on stored measurements, and cubes based on three dimensions.
Finally a way to measure a countertop without knocking Mrs. Green's potted plants off the windowsill.
Annnnnd, also a way to scribe the back wall by putting the device on a tripod and a compass rose... simple math after that to create a .dxf
I LIKE this thing.