Yes, I think the upgrade is very worth it. The slick new user interface and quickness made it a must for me. A few things I noticed:
Make sure you backup all your images. On my iPad, it told me it needed an additional 2.5 Gigs in order to install.
It wanted to conect my facetime account with my email and my phone number. I know its always been that way, but the wording was a little confusing. Maybe this one was just me.
Battery Life..or lack of.
The battery on my iPhone 5, was at 50%, by noon (thats would 100% at 8am). Things got better after I disabled wireless and bluetooth. It got much better when I reduced the brightness. This site helped me out: iOS 7 Battery Life Draining Too Fast? It’s Easy to Fix
Here are some good links to help you get the most out of IOS7: