Yes I do. I did it for server security needs but 3.5.0 doesn't run well with this version of PHP. So I have to downgrade again the server. Anyway I'm trying the porting on a different machine with all the correct versions. When I've understood the troubles in upgrading I will repeat it on server. I cannot risk service interrupts on server because the site using eZ is a very important one to me.
All necessary information and links you can find in this topic. http://ez.no/community/forum/install_configuration/upgrade_from_older_versions_than_3_5_documentation_missing