Acro+ had an issue with Cruise Control when it first came out, but that has been fixed. Rate was also disallowed when Acro+ problem was found. Since then it is my understanding that it all works, and Cruise Control works on Rate, Attitude, Rattitude, Acro+
By default settings, CruiseControl reduces motor to 5% when you go past 90 degree bank (past 105 degree actually).