I too am enthusiastic about this one. In fact, it's prompted me to search out some of her other stuff (aside from the 2 Sticks and Stones releases, which I have and also love.) I was scouring around for this one earlier today:
... which if you go here, you can read a nice review and some feedback from Roberts.
Back to 'Chicago Project.' The Anderson duets are wonderful -- a highlight for me -- but the album overall has a real nice mix of free-ish playing and more melodic-based playing -- which is kind of Roberts' MO. It's been getting pretty regular spins here, and growing on me with each new listen.
The same blog linked above has a quick review of 'Chicago' here. (Which, btw, this guy reviews a LOT of new free jazz releases, and does a pretty good job of giving you a layman's take on things. Gives you some idea of what the music's like without laying on a thick layer of BS.)