It is easy and quick to lookup whois details about a particular domain.

Tucows, or more specifically Hover, their subsidiary, is the only place I feel comfortable purchasing domains. They don't try to up-sell or use shady business tactics, unlike many other registrars. Their prices are always reasonable, and they frequently have sales. They are also very good at taking care of DNS issues.

Domain management offered good features for support team and clients we managed domains for in self storage and small business. We used tucows for sometime before switching to open Srs for more broad perspectives..