These are the ones I've had the best luck with. They're fairly inexpensive, re-usable and they help force the mouse to hit the trap head-on.
The problem I've had with the traditional cheap traps is that the mouse might approach it from the side, and I've had instances where a leg of the mouse is caught, instead of an instant snap of the neck. THEN, I had to go looking for the mouse & trap as death wasn't quick. And in one case, the poor critter was still alive.
Since using the style I linked to above they get snagged the first time. They're easy to dump the dead mouse, and reset.
One word of advice. IF you dump the mouse out of the trap and you notice the peanut butter is GONE, that means there was a second little rodent that came by later to clean up. That means you need to rebait the trap and set it out again.
Oh...check them frequently, put them along a wall where a mouse might typically run (dark, safe, not out in the open). If you trap a mouse and forget about the trap for several weeks or longer, it AIN'T pretty. THAT's when I just throw the trap and what's left of the mouse away.
Good Luck,
~Rick