Mice avoid this trap regardless of if it is baited or not.  I placed the trap along a know mouse trail without bait as instructed.  Plenty of mice as evidenced by fresh dropping but after a week not a single mouse.  I then baited the trap with the fish food they were after.  After another week no a single mouse.  I will try another location this week but do not expect any better results.  My guess is that the very small trap entrances are probably too small for mice.