it's really easy for all users, from receptionists right up my senior colleagues; I can send messages directly across our intranet system without having any issues at all! The layout of some parts could be improved - maybe try using other products that don't have as many features but look better? We've had no problems since implementing Mpneclipse into one site in particular which was previously not very user friendly- we now only use 1 place (where ever people are) instead of 2 different systems etc so this has been great for us overall.