I have used hover for years and quite like them. The customer support was awesome when I had an issue with getting a .com.au domain setup for a business. Australia has some extra requirements for domains that I wasn't familiar with. I also like to have my domains separate from everything else so if I move hosts/email providers it's easy.
They have their own accreditation for .COM/.NET/.ORG/.INFO/.CA (and maybe a few others) else they fallback to Tucows OpenSRS system, which is decent except in the case of needing advanced features like DNSSEC (for certain TLDs) where they seemingly have a "Half Life 3" type schedule of deploying new features
Cloudflare Registrar had some issues at one point but they had more to do with a broken system that assumed the domain was purchased elsewhere than anything else, if I remember correctly. Their support apparently handled that case very well.