Reviewers see Substack as strong for reading and writing newsletters, with a polished app, easy navigation, useful writer tools, and a community that helps some creators grow an audience. But the praise is tempered by repeated complaints about limits and reliability: the editor feels too basic, with weak formatting and no HTML or layout control; search can be confusing; and some users report publishing blocked by network issues. A major recurring drawback is payments, with Stripe-only support restricting monetization in some countries and frustrating some creators.