The Notion Travel Planner receives high praise for its comprehensive and user-friendly design. Users appreciate its detailed features, including transportation, accommodation, and attraction planning, along with useful extras like weather and currency converters. The template's simplicity and intuitive interface make it easy to navigate, while its pre-populated itineraries save time and effort. Suggestions for improvement include custom views for daily itineraries and expense tracking. Overall, the planner is highly recommended for its ability to streamline and enhance the travel planning experience.