The spending controls look attractive to me. I have an org that might be a good candidate, as we have several teams that need to manage expenses. Historically, we've used business pre-paid debit cards to control maximum spending, with individual authorizations managing how much folks can spend. It's okay, but it doesn't scale well.
Regarding the controls on the Stripe cards, do they have a concept for Roles? I'd like to be able to say "Managers have a monthly/yearly spending authority up to X, and Directors have a spending authority up to Y", and as we onboard new folks, to put them into a role to manage that quickly and easily.