Do you prefer your calendar/reminders/notepad to be digital or on paper?

I'm currently debating with myself whether I should get a nice moleskine day planner and just write all my calendar events and reminders on paper, or whether I should buy an iphone to go along with my Macbook so that all my calendar events etc will be synced together over the cloud (I currently have an android phone which is pretty incompatible with Mac/Apple). Everything seems to have pros and cons and I can't make up my mind.

What do you prefer and why?

Digital, because that way you can add things, change, or fix anything that you've put down.

I like wall calendars.

Otherwise, I write lists and make notes on small bits of paper;
anything inportant for the long term gets written on a full-size sheet.