Comment 4 for bug 240933

If you try sticky keys you will never want to go back. Sticky keys are part of the X accessibility package. When enabled, it causes the Control, Alt, Win, and Shift (any modifier) keys to stay engaged until the next key is pressed. For example, if you want to hit the key combination Alt-f to open the file menu, without sticky keys, you must press the Alt and f keys at the same time. For most of us, hitting 2 keys at the same time takes 2 hands. With sticky keys, you can hit the Alt, release it and then hit the f key. It will be interpreted as though they were hit at the same time.

This is an extremely helpful feature whenever you're using a cramped keyboard, as most laptops have today. Also, anyone who doesn't want to use a mouse enjoys this feature, because it's easier to use keyboard (combination) shortcuts to get around the desktop.

Try it and I think you'll become a user. Unfortunately, if you use gnome, you'll get a buggy implementation (search and you will find other bugs about gnome and sticky keys). But, kde-3.5.x has it implemented perfectly (even better than M$)!