Still a PITA
We use Rackspace and it caused a major pain in our tech support. About 1/2 of our customer base was affected (those that needed to do a DNS lookup). We were patiently explaining how to type in the load balancer IP into the address bar and to accept the certificate to get back into the system.
More savvy users modified their hosts file to make it work. Posting directions on our FB page and internal FB area for customers only, which is the only presence we have other than Rackspace-controlled DNS websites helped quite a bit. Luckily most of our customers are great and took it in stride.