BEFORE upgrading to L8, please consider a few things. Probably a little late for this now.
1. We know that there will be a small (and sometimes big) learning curve.
2. We know (especially from past experience) that there will be some bugs.
3. We also know that there will be some things we won't initially like.
Considering these points, look at the launch event and other VIDEOS for a few days before jumping in may prepare you.
Personally, I'm experiencing each of the above 3, but all in all, I like the new system. In about a month or so, I probably will love it. 
Be blessed in the LORD.