Super ... also for backache.

So the delivery is very fast and well packaged, quality of the belt prop. Super. So far everything works and is also very comfortable to wear. From Stuffe 16 I remember correctly, the doing something.
Whether it really helps to build muscle, I can not say yet.

Since I've always been very severe back pain (of the muscles), I've just done the belt at the back and it helps suuuuuuper: D.

So I would buy it again. Good would be if the display would be illuminated !!