I've used Netfirms for probably two decades now, and I own about 8 domain names. Registering domain names with them is easy and fine, and they auto-renew, which works well for me.
Over the years they have upgraded their user ... Vairāk interface to be a little better and friendly, but it's still very hard to find what you're looking for. And their customer support sucks. I wanted to use them for Google Workspace because they offer a cheaper rate, but after exchanging one message with customer service trying to solve a problem, I never heard back from them. You really have to get on chat or the phone in order to resolve your issue.
But I have never had issues with downtime on any of my websites and it's fairly easy to make changes to nameservers and things like that. Mazāk