The wait is over! A few hours ago I received the invite and ~$10 on my account.
So far everything looks great; I've noticed a couple new features, but the sleek user interface is the real bread & butter.
Account balances are displayed in USD as are Tx's. Navigating is very easy, and I imagine it would be for the layman as well.
Security settings, addresses, and Tx details can be found without difficulty.
For those interested, here are a few screenshots:
https://i.imgur.com/zTqKB7D.png__
https://i.imgur.com/owyDMwe.png*I have no affiliation with Circle (other than as a client), and if anyone from Circle would like me to take these down contact me.*