I am starting over from scratch--it's like a brand new game! Today I finally had a chance to download it, and I'm so excited about the changes, improvements, etc. Loved the original, but everything that was a frustration (yes, you are often frustrated with the ones you love) seem to have been fixed. It's like you guys read my mind!
The story seems a bit different/deeper, but maybe that's because I have been at the end for so long and just replaying levels to get bonus stuff that I have forgotten. Anyway, this has sucked away about 6 hours of my life today and is liable to do more damage. Very nice upgrade.