Qualitatively. The plastic is strong, there are several options for bending, the purchase is happy. Recommend!!!!
Good thing, my young man and I are using it together. I like it at the second mark-it's straight in the back. If you are very strong in the back massage balls, you can put on a massager a thin plaid or put on a blouse thicker. But I'm fine and so, often in a dream, when I lie on this thing.
Delivery 1 month. In the case I tried, I liked it very much. Plastic is rigid, does not bend. Has 3 levels. I did not communicate with the seller, everything was done on time. Goods quality, I do not have any complaints. The thing is super useful. I stopped hurting my back. I pull my back on it every night for 5 minutes before bedtime. I strongly advise everyone to purchase, even those who have a back yet do not hurt.