Horrible for four reasons:
- They presume to know what you're doing.
- If you roll the pointer off the edge of a submenu block, it disappears. You need to go all the way back to make it pop up again.
- If you roll the pointer past one on your way to something else, it hulks into view, blocking the thing on the screen that you wanted in the first place.
- They don't work on most touch devices.
Here's an example. If you're using a mouse, run your pointer over More or Programs in the menu bar.
When I come across one of these menus, it doesn't feel like the site wants to help me navigate. It feels like the site is desperate to show me something. If it's that important, why is it tucked away in a submenu?
The race to a one-click utopia is getting ridiculous.