Hi schvictor and welcome to the RH community.
I suggest that you wait for the official release, download
the trial and thoroughly test it out using copies of some of your
current X5 projects. Only then will you know for sure if there are
issues with it. No one can really advise you on this as we don't
know how you intend to use it.
It is not available yet but it is expected within days. I
suggest you install the trial on a PC other than your production
machine. That avoids any issues with needing to uninstall it later
should you decide not to upgrade for whatever reason.
Also make copies of your projects before you open them in
RoboHelp 7 as the code will be rewritten on upgrade.