I use Logic Pro 8 and I love it. It has so many capabilities, it is pretty intimidating at first. Once you start getting used to it, it really really grows on you. I think I still only understand a small percentage of the entire application but I already can't live without it.
Here are a couple links that may help.
This guy is truly the Logic Ninja. He shows you how to do some amazing stuff.
SFLogicNinja YouTube videos
I wrote a description of how to display and modify bass tab on Logic. Some steps aren't well documented:
How to configure Logic Express or Logic Pro to display bass tab
One more tip: for me, the 8.0.1 update seemed to introduce more bugs than it fixed. Back up version 8.0 before you update; you may want to go back.