The first thing I want to say is that this is a well built safe mouse catching trap. I would put it at a 3 to 4 star rating for a few reasons I will list below in a moment. Few Tips, I love animals, but if you have one mouse, check for two mice in your home.  If you have two mice get a VARITY of humane traps (not all mice work with the same trap) very quickly, ship them overnight to your home. If they don't work in a week, get deadly methods. You can also use the glue traps and can get them out with gloves and spray oil or put them down in a closed bucket or ice chest with dry ice by the side of them, not on them as this burns and is inhumane.  Mice reproduce from three to six and so on very, very fast.  If you don't move fast, within 3 weeks to 30 days you can have many mice in your home. They often move in pairs of one male, two females.  Also, lock your garbage can and your food up in plastic bins, mice can get up high, leap out of buckets and seem like super critter's really!  Also, check for holes in your plumbing, wash room, outlets etc. Seal these off with metal covers. Wear shoes, if they bite you out of fear, their urine and feces and saliva all carry lots of disease. BACK TO THE TRAP - the problem with this trap is that the holes on the side to help the mouse smell the bate are too big and the mice just use their hands to reach in and scape off the peanut butter or get to a treat and pull it towards their claws. The size of the trap is an issue and some mice are afraid of it.  I caught one young mouse out of four in our home with this trap. It was easy to lift the lid later to let the mouse out without touching the mouse. It was well made so the mouse could breathe and with a weight on top like a can of beans the mouse could not lift the lid to get out. It was big enough to leave some water too so it did not dehydrate while I got to the trap to let it out.