I've been running v12 pretty much since it's release. I don't know that I have noticed any real changes between v11 and v12, but supposedly you get free updates for life, so that's nice. With MOM, the biggest need to upgrade to v12 would be if you are running MOM v6. R&R v12 is supposed to be able to handle the Foxpro database containers that Dydacomp switched MOM to. I am still running MOM v5.4, so no real changes here.
I just bought version 6 and now I 'm forced to buy RR12.1 in order to keep my reports functioning.
I hope this works. Keep you posted.