Many people compare registrars by price, domain search, and checkout. That is important, but I think the control panel matters more after the domain is actually in use. Once a website goes live, customers need to renew domains, update nameservers, manage DNS records, change contact details, set domain lock, get auth codes, approve transfers, and sometimes manage many domains at once. For agencies, hosting providers, and resellers, this can become a real issue. If the control panel is hard to use, every small domain task turns into extra support work. A clean first registration is good, but it does not show what the registrar is like six months later when the customer needs help managing the domain. For people managing client domains, do you care more about the control panel experience or the lowest possible registration price?
Control panel is the thing that decides whether you stay or shop around at renewal. Registration is a one-time event. DNS management, nameserver changes, bulk renewals, auth code retrieval, that is the daily grind once you have more than a handful of domains, and a clunky panel turns every 30 second task into a 5 minute support ticket. The part most people underestimate is how much the panel matters for emergencies. DNS propagation issue at 2am, domain lock state is wrong during a transfer window, registrar contact info needs updating before an audit. You find out how good the panel is when something breaks, not when everything is running fine. If the UI buries the auth code behind three menus and a support request, that is a real cost even if the domain itself was cheap. For anyone running client domains specifically, the billing transparency piece is just as important. Some registrars make it nearly impossible to tell which domain is renewing when, at what price, and whether auto-renew is on or off across the portfolio. That creates risk the moment a client domain silently lapses because the renewal notification went to a default email nobody checks.
Good point on billing transparency. For clients, the biggest risk is often the small hidden stuff. A good control panel should make those things obvious before they become support tickets.