Earlier quoted context omitted.
Their UI is horrendously busy for YC founders, but as everybody else is saying, "the price is right."
Everybody complains about the UI -- but it's domain registration! How often do you really use the UI? A couple times a year, maybe? GoDaddy is super cheap and reliable (for domains). Until somebody makes something better (and equally cheap), I'm staying.
On the other hand, I'd love to see some enterprising company (even godaddy; all it "GoDaddy Pro" or something) come up with a no-frills domain reservation/management service inspired by http://domai.nr/ and http://manage.slicehost.com/ (Slicehost has an awesome, simple management interface).