Sometimes too well. Doesn't always happen, but it happens often enough. Anyone can use traps - they are cheap, effective and can be used many times over. Not only that, but when you catch him you know it. He doesn't curl up and die behind some wall where you can't find him.
Exterminators usually take the easy way out and leave bait.
Most people don't want the hassle of attending to mouse traps , but it is better to trap mice. And for those of you considering the purchase of one of those ultrasonic devices - don't. They don't work. They don't work for any kind of animal. It's easy, cheaper, and, if you're good, much more precise.