Clean navigation and interface design, sharp colour contrast between the foreground and the background.
Pricing looks reasonable too. No signs of overselling. That's good. Information is easy to find and the ordering process was a breeze (I just tested it, didn't actually signup for a plan, yet).
Though, you could actually have the domain name section added into the knowledge-base, since you are offering customers domain to buy.
Overall, great site! 5/5 stars