Back massage well above but below only satisfactory

We had the massage mat at Amazon and a slightly more favorable cushion also ordered and tested by Beurer. Ultimately, we then decided on the mat because the relaxation of the whole body lying of course is better than sitting down. The massage mat in the upper back is good. Those like me who has a somewhat more pronounced swayback, on the other hand noted very little massage effect in the lower back. In the seat pad in direct comparison, the massaging effect on the entire back area was uniformly strong.
My recommendation: mat and cushion order together and then decide;
The return of the seat cover closed as usual flawlessly through Amazon.