Are Zoho Books good?

They are certainly amongst the top-tier !! They stand out in many ways. Very attractive and intuitive UI (web as native desktop and mobile), very stable platform with very regular (backend) updates, in stability as functionalities. Very customizable to suit your specific business needs. Advanced possibilities with Automations and Workflows !! Open to almost any Integration (native as third-party) with public available API. They will provide you with a best UI as rapid and flawless (technical) support. Do not hesitate to give this market-leader a spin.

Yes its good