Reviewers mostly like Brex for bringing cards, reimbursements, bill pay, approvals, and spend controls into one place, with easy setup, clear visibility, useful integrations, and solid credit limits. Several say it works especially well for growing teams that need structure around expenses. But the praise is tempered by real frustration: some users report buggy bill pay or reimbursements, weaker reporting, and a mobile app that needs work. Most notably, a few describe sudden account closures or harder onboarding, raising concerns about support, transparency, and startup friendliness.