Users like you -- ie. happy with their installation -- should be cautious
for a few reasons. Installations can go wrong. Things you currently use may
be no longer available. It is a time of flux with two new desktop
environments which both have some growing pains, Unity for Ubuntu and GNOME
3 for Mint. The final consideration for Mint users is that there is no
upgrade tool. You can sort of do one in a roundabout way, but Mint advises
a clean installation. I have used the roundabout way in Fedora with little
success, but have not upgraded Mint.

We often get excited when a new version comes out but that does not always
translate into a better experience for users because we are all different
with different needs and levels of frustration.