Reviewers mostly describe Quo, formerly OpenPhone, as a simple, dependable business phone tool that is quick to set up, easy to navigate, and useful for calling, texting, and separating work from personal numbers. Several highlight strong call quality, reliable day-to-day use, and practical features like HubSpot integration, AI call summaries, international numbers, and support for larger teams. But the praise is not universal: one user reports serious bugs, including failed scheduled messages and lost contacts, and says customer support was slow when problems arose.