My take is that it would be a good tool on a three week trip and you drop your bow 100 miles from your tuning bench. You could put the laser on the bow and verify that the rock really was harder than your Loc-Tite'd screws and knocked your rest 1/8" out of whack. You could recenter the rest to the laser and shoot a few practice arrows to be back out hunting that afternoon. If the price isn't out of line, then I may look into them, also.