Be aware, you will get made fun of a lot for using it. =)
Really? I work on commercial sites too and of all my tools the laser has probably gotten the most positive attention. Clients are impressed and people that have never seen one flock to it like files around a pile of dung.
On of my favorite times I had a meeting with a client in a condo and I was taking measurements with my laser standing in nearly then same place. Then the kitchen guy shows up and begins to run around like a chicken with his tape measure. He saw my laser and said "gee that's really something" my response was "well I'm just too damn old to run around with a tape anymore" (the guy was easily 20 years older then myself).