I have bought this K&M 14087 from Thomann a few days ago and I am very impressed and happy with my purchase. This is the best piano bench I have ever purchased.
It took a bit longer than usual to arrive but that is probably due to our slow postal service as well as customs procedures here in Spain, not Thomann.
The K&M 14087 is absolutely comfortable, stable and solid. I had read a review that it is a bit heavy but I manage it quite well and don't have any problems with that.
After using various cheaper x-stand benches that either bent in the middle, or had the support pieces breaking off and sending you crashing to the ground after a couple of months, the K&M 14087 looks like it will last me a lifetime.
Where other benches took forever to set up, I can set this up in less than a minute, which is very useful for a travelling musician like myself. The height adjustments are clearly marked, and can go either very low or very high, depending on your preference. Once I found my preferred height I memorized it so that adjusting the position took mere seconds.
The bench is wide, allowing one to easily move from side to side, and the seat padding is solidly made without being too hard, while the imitation leather is of the highest quality and not sweaty. And because it is not an x-stand, I find it very good for placing my feet in any position below it that I desire.
I highly recommend this K&M 14087 bench to anyone who wants quality as well as peace of mind.
I personally think that it is more than worth every penny that I have paid.