first use results == ... and when i checked on the trap it had mouse droppings and an evidently uneatable muffin piece the mice chose not to eat (ever wonder when a human food isn't eaten by mice, what exactly could be wrong with it?) compared with the other food (so proof the mice did visit/get inside) and that was it, so all i did was serve some scraps to the mice cause it was empty!  i have used the plastic box traps (3 alive, 1 dead and full of flaws) before i tried this one.  if a mouse can come in and out then its not a trap.  i will use it again and maybe checking every 4-6 hours and not 12 hours means i can catch the mouse before they exit?  but folks i am at my wits end trying all humane traps, and understand why folks with real, real, mouse problem just use the death traps... its depressing opening your humane trap only to find thank you poop... the plastic window version makes a lot of sense, but its easy to peek into the sides of this trap.  it looks constructed well, however this entry ramp thingy into it is two way.  <<a month later and again the food is gone as is the mice, for some reason this trap has zero success compared to those that loved it -- wonder if smaller mice, like the standard house mouse i have caught with other products can escape back out through the ramp, so right now one last try then i throw this away as "useless".  maybe mine has a flaw in the auto shut capabilities of the ramp - its the only way in and out.  either way ALL FOOD gone, NO MICE inside>>