Some of my favorite Gubaidulina works: Sieben Worte, Fachwerk, Viola Concerto, Pro et Contra, Offertorium, Music for Flute, Strings and Percussion, Piano Sonata, Garten von Freuden und Traurigkeiten and Alleluja. She was a difficult composer for me to get into because I didn't quite understand where she was coming from musically. Sometimes it takes awhile to assess a composer's style(s) and Penderecki was another one that took me quite some time to get into. She's not easy and her music doesn't fall on the ears like a velvet blanket, but I think she's an incredible composer and has a phenomenal ear for sonorities.