I does seem different than the Maestro (which is the Kooiman model for clarinet and oboe), in that it makes contact with the palm of your hand, rather than with any part of the thumb.is that not more or less a copy of the Forza Handrest? (plus fancy colors?)
which is the established hand rest for years and years?
As for the price, these things are all expensive
I bought one during Covid 19 crisis last year. Took nearly 5 weeks to get it. Stalled in Europe. From Finland to San Francisco. According to the instructions some of the keys in the lower joint were removed so that the metal wrap could be installed. The thumbrest was removed. After reassembling, I tried different positions and settled on the placement of the thumb rest, the palm L bracket and finally tightened up everything. I took my time so that I could hold my clarinet with my right hand in place. I demonstrated it and asked people to hold my clarinet. Unfortunately, a lot of people felt uncomfortable about removing the thumbrest, how awkward it looked and putting it on when playing. I never mentioned the price. I found a protective pouch to put the thumbpiece into my case. the stem was bent to get a little closer to the clarinet so that I had a natural curve in the right hand which is actually pushing up the clarinet for support. I do not need to use a neck strap ANYMORE and feel comfortable playing standing up. Consequently, my technique improved. Incidentally, I use both Kooiman models too.
Actually, I think that the problem is with the trailing /en - Freewing – Handrest for Woodwind instruments (with or w/o the https://") worked for me, while with the trailing /en it failed