Thomann KB-15WHM

Aesthetics are very good. Mine is of white color, painted really well. Seat fabric made of velvet, looks very nice. Build quality seems to be well made at first sight.

Stability on the other hand is not so great. The seat starts to woble a bit to the sides when the seat is heightened. This may probably be fixed, because mechanicaly there seems to be no major faults. There is also a single screw underneath which I've found to fix everything if I tighten it all the way to the side after I set up the correct seat height. It is not very comfortable though if you change the seat height very often (schools?). Just have in mind that stability issue could be fixed with this method.

Apart from that I think that it is worth the money. I couldn't find a cheaper bench on the market and I'm quite happy about the purchase on this.

UPDATE: after I used it for a year or so, the bolts that keep the bench together keeps untighting, so be prepared to keep everything in check and do necessary adjustments every once in a while. Still, I think it's a very good deal for the low price.

I returned this product 2 times because it was received damaged.
It took weeks to get a new one, so after I received the 3rd one, already several months had passed after the initial order date.
Unfortunately the last product also arrived damaged, but not so badly as the previous 2 ones, so I decided to keep this, and even got a partial cashback from Thomann. The packaging of this product is for bundled (pallet or container) shipment but is not suitable for individual shipment, as the product has a big chance of getting damaged during transportation. It needs an extra overbox with shock absorbing material.

This stool has served our family very well for six years so far. I expect that it will serve just as well for the next six too. It is strong, stable and the adjustment mechanism works smoothly and reliably.
I noticed that it became slightly wobbly after a year-or-so and re-torquing the four main bolts quickly fixed this. They were loose again after about another year, so I reinstalled them with some thread-locking compound and they have been fine since. Therefore i would recommend that thread-locker should be used on first assembly -
obvious to me in hindsight.
The finish is still very good except for where my three-year-old son hit it repeatedly with a steel hammer (but luckily not the piano!). The velour cloth covering, however, shows no signs of wear.
A good purchase I am happy to recommend.