I thought about it but, at north of £50 including shipping to UK, I'm not so sure. You could get a decent, more versatile monopod for that price.
I purchased the Kohla fix & focus earlier in the week from the site in Germany and it arrived yesterday. An initial try out last night and a more thorough one today leads me to say this worked better than I thought it might!
Doesn’t quite compare to steadiness achievable using monopod/Finn stick approach of which I am a fan, as resting on lower chest region, there is some movement through breathing normally. However, it helped immensely in holding binoculars in viewing position longer than I would have otherwise been able to and is far more portable.
Worth mentioning that I have a weakness in one shoulder from a distant injury so perhaps the benefit was more pronounced and noticeable for me. I used it with the Swarovski EL 12x50, the EL 8x32 and the Zeiss FL 10x42. Not surprisingly, benefits easier to appreciate on the heavier and higher magnifications.
Well worth the c£50 in my opinion.