You have to try it for yourself and do not listen to hearsay. Unity hype
goes both ways. Lots of people hate it and lots of people love it. Few are
ambivalent. It is very different, but so is the alternative, GNOME 3. GNOME
2.32 used in 10.10 is not going to be around for the long haul. GNOME has
plans to shelve it and Canonical plans to do it as soon as 11.10. I suggest
that you try Unity for a week in a VM or installed to a usb stick and if you
do not like it then do not upgrade. If Unity will not work in a VM for you
then try Unity 2D which is getting very close to Unity in terms of features.
The look and feel is the same.