Hi, my name ist Peter Fischer. I am a Physical Therapist and invented & patented the PALM in 1994. The year after I licenced it to "performance attainment associates" (ww.spineproducts.com) who have porduced and sold it ever since. I distribute the PALM exclusively for Germany and non-exclusively for the rest of Europe.
In my clinic I still use my original PALM from 1995 on a daily basis & it still looks as good as on day 1.
I therefore dare say the manufacturer succeeded in producing a quality product.
If you like the PALM, you might be interested in checking out some of my other therapy related inventions: