I have talked to my PCC about 4 times since I'm a first time cruiser with a ton of questions. I got voicemail a couple times and didn't leave a message. I emailed twice and found response times pretty slow, but if I got her on the phone, she was helpful in answering all my questions.
My biggest issue just happened today. I had been debating a Thermal Suite Pass, which I could not book online or through the app. She told me it was $249 and that would also be the price onboard the ship. I finally decided to pull the plug today and was told I just missed the promo price, which ended June 1. It was now $299. I pointed out that I specifically asked her if the price was the same on the ship and she said yes, only to now be told it was $50 more. She apologized but claimed it was a surprise to her too and only after I expressed a ton of frustration did she offer to ask if she could get me the promo price. Since I repeatedly pointed out, nicely, that the fault was on her end for giving me wrong info and not telling me about the deadline, she emailed me back to say she could get me the cheaper price. But it took a lot of nudging to get her there.
So my experience was hit or miss. Otherwise, she answered questions about the capacity of the ship, the difference between the beverage packages, and also checked into how much an upgrade would cost me.