As Seitenschläferin I had often the problem is that I have moved my knee, which was often painful and the pelvic area, I felt that too often when I was sleeping too long on one side. With this cushion, which, incidentally, I do not find too filled, like others here, I was finally able to sleep without pain. It is hard to believe, what does it matter if they changed the angle of the legs to the pelvis back.
Addendum 11.19.2014: The cushion is me now too short, because I with the poor also would like to embrace it at the same time. Now have ordered 145 x 40 cm me the size. All are around the 1.70 cm and larger, I recommend here to order the larger side pillow. Covers are available to in all colors.