I've skated there a few times when in town for work. The rink is pretty warm and the ice is nice. If you're going for morning freestyles, the early ones tend to be quite crowded. I've been impressed with the etiquette on those sessions, but they are crowded none-the-less. The natural light is gorgeous. I believe they only use RinkMusic for running programs, so I have never run my program while there.
You can buy walk-on admission for freestyles at the desk when you come in. I don't think they take American Express. They've always been really friendly with me when paying.