I've had the Gateway card, which has no annual fee and was what it took to get better award inventory.
The Quest card is $350 annual fee with a $200 UA credit. The rest of the benefits are pretty much useless. (already have free bags. Already get Economy Plus. No idea what Renowned Hotels are and seems unlikely I will find out. Don't want Instacart. JSX doesn't serve any routes I fly.. Already have GE/Nexus with orher cards and Priority Boarding.)
The spend categories are not compelling.
So this works out to $150 net expense with no motivation to put any spending on the card. It's not really getting me into UA credit card ecosystem. Maybe the base of GS customers is too small for United to care. I'd appreciate either a compelling product offer or else not to feel like I'll be disadvantaged.