Reviewers largely see Refrens as a simple, practical tool for quotations, invoicing, and payment tracking, with an interface that is easy to learn and quick to use. Many highlight smooth quote-to-invoice conversion, customizable templates, direct sharing, reminders, and useful extras like expenses, CRM, inventory, and multi-entity support. It is often preferred over heavier systems because setup is faster and less complex. The main complaints are limited invoice-only pricing, gaps in deeper reporting, workflow and template customization, integrations, mobile polish, and stronger regional localization.