Received the upgrade in the mail after having paid $9 for shipping me the upgrade and installed the MPC version and I have to say that iGuidance now ROCKS!
The buttons are big enough so you don't need a magnifying glass or a stylus to tell which button you're pressing. There's this nifty favorites feature that's pimping. Haven't been able to mess with it much due to other unforseen events but so far I'm VERY happy with this new version.
If you have version 2.1.3 and you bought it after December 20th you should DEFINITELY spend the $9 to upgrade. You'll definitely be glad you did.