I can't give definitive results because I have too little feedback for now, but it seems to be going much better...
Today I'm trying to update a production server with few users and let's see how it goes...
Gabriele Maoret - Head of SysAdmins at SERSIS
Currently manages 6 SmarterMail installations (1 in the cloud for SERSIS which provides services to a few hundred third-party email domains + 5 on-premise for customers who prefer to have their mail server in-house)