We've just returened from a Princess cruise a few days ago and there wasn't a coffee maker in our room. However, my hubby and I both commented on how delicious their coffee was on this ship (Sapphire). We ordered a pot of jo along with a few breakfast goodies in our room daily at no charge..we do include a tip though for the person delivering it...usually about $1 US. To be honest even if we had brought our own (after trying thiers for the first time)we probably wouldn't have made our own anyway. Heck spoil yourself...let them do the brewing!
Hope you have a GRRREAT time on your cruise!