Correct me if I'm wrong...
$450 renewal fee, $300 annual travel credit, so the card costs $150 per year.
With points valued at $0.015, you need to earn 10,000 points to break even (150/0.015).
You get 3 points for every $1 spent on food/travel, so you need to spend $3,333/year on those categories to break even. Personally I spend way more, so the card is definitely worth it to me.