Started about two weeks ago and has been a nice change so far. The PA system and jet bridges all work on that side of the terminal! The only downside for me is no Camille's nearby. My hope is that the renovated A side is as least half as good as B in terms of modernity and functionality.
Note that the ticket counter is still on the A side, but the baggage claim is the last claim on the B side. If you have luggage issues you will need to make a longer trek to the counter than in the past.