They sure can...those things are pretty remarkable.
I only had a chance to fly one in IMC once and it was like flying VFR...I love 'em.
I agree with you about having a hard time if you don't know much about it....I had to move one about 20NM once with only basic knowledge of the system and I was actually more comfortable using the backup instruments.
If you want to try again, the manual is available online PDF and I think Garmin has a sim that you can download.
Other features:
-automatically tunes frequencies for localizers, etc when you load an approach
-automatically IDs naviads when tuned and displays it's identifier next the the nav radio box
-allows you to insert a point into and build flight plans by scrolling across the map with the joystick and clicking on the waypoint
I'd better stop.....there's just too much to mention.