We get a lot of mice when the weather turns cold.  I've tried every type of mouse trap on the market, including spring traps, repeating traps, electronic traps, etc.  The old-fashioned spring traps are the best and cheapest solution, but they can be a bit gruesome.  This tin cat trap is the most reliable alternative I've found.  When I hear, see, or smell mice, I put this out and invariably end up finding mice in it the next morning.  The first tin cat that I bought almost 20 years ago is still catching mice.