I just signed on with mrregistrar.com last night and they're interface is great. Good choices of buttons or make your own and a very easy to use and configure API. I had my header and footer in within 10 minutes and created a custom search panel. All was done in about 30 minutes.

I even had a minor glitch with my header showing but they responded right away and told me the problem. I fixed it and I was done.

Nice service so far. Good prices as well.