If you have a multi CD server ( not changer)it's OK, otherwise the wait for the disc drive to swop between the mm & IPC can be slow & frustrating but still better than trying to get the tapes to load.
Not all PFR codes tie up with CAATS but again it is just time finding your way around. The examples AI give all work & are not examples of whatare seen daily. ECAM warning is there but not the related maint message.
At least we just get new discs every 3 months rather than a load of amendments.