I can honestly say ive NEVER used mine. In both the vechiles ive owned i never touched them, so i dont even know if mine works. I had the recall done when it first came out, and in have the fuse installed, but ive never felt the need to try it.
when i first used cruise control....i found myself getting too comfortable and not paying as much attention to the road as i should. Plus, i like being more in control of my truck when i drive...its a more secure feeling i guess.