There are 2 types of people who would find the Freedom Flex card very worth it.
The first is anyone looking for a strong cash-back card that charges no annual fee. With 5% cash-back on quarterly categories (up to $1,500 in spend) and travel purchases and 3% back on dining and drugstores, the amount of cash-back you can earn can amount to significant savings.
The second type is people looking to earn as many points as possible to maximize travel rewards by pooling points with a premium Ultimate Rewards card such as the Chase Sapphire Preferred® Card or Chase Sapphire Reserve®.
How is this possible? When you transfer the points earned from your Freedom Flex card to a premium Ultimate Rewards card, your points are then worth 25% to 50% more when redeemed through the Ultimate Rewards travel portal, or even more when transferred to one of the Chase airline or hotel transfer partners.