No credit card required
Browse credit cards from a variety of issuers to see if there's a better card for you.
Never tried them for a mortgage though they were fine for everything else... but many CU's outsource their mortgage process to some extent so it's hard to say with any one of them without first hand experience.
That said, take a hard look at their origination fees... I saw their rates and like you was pretty impressed, till I saw the customized rate quote, then things snapped back to what I was expecting for rates when buying no points (effectively).
Thanks so much! I'll have to look closely at the costs.