Instruct: Classify the given review as either positive or negative.
Query: Excellent Add-On for the Laser Level!!

This is a great addition to the Laser Level by Strait-line! It just snaps easily on to the laser level, then uses sticky strips to adhere to the wall so you don't have to worry about poking holes in the wall anymore! The stickies are easily replaceable too, you can buy them in packs of 24 (and it takes me a little while to go through 24 of the buggers!).