My physio recommended that I purchase a wedge cushion (giving a basic specification) as an additional aid to help relieve the calcification/tendonitis of my Ischial Tubrosity. This device has been useful in relieving the pressure on the said area at the same time improving my spinal posture! The service I have received from Essential Aids has been Friendly, fast and efficient without breaking the bank! I would rate your service as 5/5.