The back is relaxing. It was a little difficult to place it in the middle, afraid to break all the same plastic. On durability, i can not say anything yet. But my light weight (62 kg) withstands. I will add feedback on later
Got very quickly. It's all right, you have to start with the smallest bend. Then gradually extend it to your tolerance.
The massager itself is made qualitatively, the plastic is good. A little wrinkled blue insert-probably will not straighten out, but this is a trifle. She could not insert it herself-she asked her son who is 18 years. He also managed with difficulty. It is better to put in the middle position. Lie down relaxing for 10 minutes and roll down in the side, and then slowly get up. Helps to stretch the vertebrae a little. It helps me relax my back. Do not expect for any miracles. Thank you for my product.