camel
Pre-takeoff checklist
Yep. For more than one reason. Obvious that the free US government charts don't cover over countries. Other countries may charge for them and multiple countries mean multiple contracts. Different countries have different formats.
Jepp provides a single source with consistent formatting, whatever country you go to. That's a bargain.
This is key for me. I'm planning to fly to Argentina in the next year, and I was dreading having to gather all the charts for all the countries I plan to fly in. Now I just pay Jepp $253 and I get all of South America. I think just Argentina charges $50 for their charts (the "MAPRI" - $700 pesos according to this page), and I think they're on paper! Definitely a bargain in my case.