It's a great way to learn about what's available while you're working; a sort of "learning in the background". Unfortunately the out of the box configuration can be a little slow. To speed things up:
- Reduce the number of links displayed. Go to Tools -> Options -> Environment -> Help -> Dynamic Help then check "Limit number of links per category" and enter a number smaller than 10 in the box on the right. I use 3.
- Reduce the number of categories.
- Reduce the number of Topic types.
- Try some of the other options.
For step 1, 3 has turned out to be the magic number for me. So I leave everything else turned on.