I just have one domain name with 1and1, I HATE their control panel, NO full DNS control, I don't recommend them for domain registering!
Once I have tried to register a domain name, when I asked about their support , here's the email what I got from them.
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Dear ......................
Thank you for contacting us.
The reason why you can not login to your 1&1 control panel is because we
are still processing the purchase of your account here in our end. Since
you are worldwide customer, the purchase process will be finished
approximately 10 days from the day you initiated the purchase of your
account. Thank you for your patience on this concern.
If you have any further questions please do not hesitate to contact us.
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Sincerely,
Jerusalem Tanilon
Technical Support
1&1 Internet
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THEY ASKED 10 DAYS to register my domain, Really funny!!!!!!! but I never got respond from them after above mail. XD