As with any software, there is always a risk in upgrading as
you may well have done something non standard. That said, for the
most part the experience has been good.
Take a look at the topics on my site.
What's in RH7 tells you about the features. At the end are
some useful links including one about Before You Install.
Using RH7 tells you the issues found so far and any
workarounds, plus information about practices.
Personally I like RH7 in day to day use.
Help others by clicking Correct Answer if the question is answered. Found the answer elsewhere? Share it here. "Upvote" is for useful posts.