The only challenge we had with it was with the battery door/compartment. The included 9 volt is a tight fit in the compartment. When you close the battery door it catches on the top of the trigger, turning on the thermometer. With the laser on the same side you could accidentally shot it where you don't want to (a face or eye for example). Thankfully you shouldn't need to change the battery out too often.
I received this item for free in exchange for review, however all opinions are my own.