Review (4/5): No Lower Back Support
We have a tall, jetted tub. This pillow, when installed as shown on the product page (smaller portion on top edge of tub), does not extend down far enough to provide lower-back support. It's fine on head and neck, but my back ends up at an awkward bend. I moved it down to provide lower-back support, but then the back of my head contacts the top edge of the tub. This may not be an issue in a shallower tub.
The cushioning is great and the suctions cups keep the pillow in place very well. You'll likely need a fingernail, plastic card, etc. to free them from the tub surface. We remove the pillow from the tub surface after each use to allow complete air drying, including the suction cups and bottom side.
Recommended, if the size suits your needs.
Review of: https://smile.amazon.com/gp/product/B082DXHTX8
"Charyeah Bath Pillow Bathtub Spa Pillow With Powerful Gripping Suctions, Comfortable and Soft 2-Panel Cushions for Head, Neck, Back and Shoulder Support,Fits Hot Tub, Jacuzzi, Spas"