The financial planner benefits if you invest rather than pay toward the mortgage. Keep that in mind.
This is a question that gets discussed endlessly on the forums. Many factors come into play, and in the end, what's best is what lets you sleep well at night. For me, it's a paid-off everything. For arebelsby, it's the exact opposite. I'm happy with my decision; he's happy with his. The real point is to spend far less than you earn, have a plan, and follow the plan. Many roads to get to the same place, etc.