I have a problem with the Schweizer solo albums mentioned in my earlier post because her playing sometimes sounds mannered to me in a way that's hard for me to describe. Her Chicago solo album is much more spontaneous to my ears.
In my opinion the first few lines of the review of the Piano Solo albums in the seventh edition of the Penguin Guide hit the nail on the head: "Schweizer is not a natural unaccompanied performer. The most communicative of players, she needs no one to play against, but she simply functions better in an environment where there is an element of interchange and reciprocity." The review is favorable, by the way.