Reviewers mostly see Brex as a useful finance hub for managing company spend: they praise fast setup, easy-to-use controls, virtual cards, integrations, decent credit limits, and a cleaner workflow than juggling cards, spreadsheets, and email. Some also like cash management, bill pay, rewards, and the founder community. But the sharpest complaints are serious: several users say accounts were closed with little warning or explanation, forcing painful banking switches. Others mention buggy reimbursements or bill pay, weaker reporting, mobile app friction, and virtual card setup becoming less startup-friendly.