Especially if you have children especially, or have investments other than RRSPs & TFSA, you need a Will. This is not something you should be postponing or procrastinating.
It will cost you about $500+ per person, often more depending on the complexity, but it is the responsible thing to do. I have a great infokit to help you. Let me know if you need it or if you need a lawyer referral. We have a great guy who cares and can really help outline your last wishes.