I have been long time user of 1and1 for domains. Their initial product offering is always sweet (free, 1$ domains) etc. Their renew rates are not bad as well.
But the place where I hated them most was NS change propogation, it took 24 hours to get that done.
Also their admin panel is awfully slow.
If you guys don't already know it, here are some of the links to help
1and1's Control Panel is quite painful to use, but you don't have to go through cancel.1and1.com to transfer a domain - just make sure your domain is unlocked and you have the EPP code handy.
But the place where I hated them most was NS change propogation, it took 24 hours to get that done.
Also their admin panel is awfully slow.
If you guys don't already know it, here are some of the links to help
To transfer/cancel domains you must go through : http://cancel.1and1.com
Admin: http://admin.1and1.com