Best domain registrar?

Sounds like a lot of people are recommending Moniker, I might try them out. Anyone had any problems with them?
 


-1 for Godaddy. Arrogance combined with the most annoying UI out there.

+1 for dynadot - the best UI by far.
 
Cheapest:

Netfirms = 1st year (promos t $3.99-5.99)
Resellerclub = Renewing ($7.89-$8.39 which includes whois prot)