Should I have gotten the new one instead? Is the only thing missing in the original the new exercise information?

I used the old book (bought used) and did fine. I think there is a thread here that explains the exact differences. Other's will respond, I'm sure.

There are changes in the food lists too but they are available in the stickies in the FAQ Section.

IMHO I got and continue to get much more useful information from this website than either the original or supercharged book.

So it's okay to use the updated foods list if I'm reading the old version of the book?

If you mean the updated food list from this website, then absolutely!

thanks