After researching online, I opted for this stool and Thomann's price was the cheapest on the internet. It's arrived, and is very solid and comfy indeed. I'm glad I purchased it.
However, be prepared for the interesting instructions that come with it, that are replicated here exactly as is, with all original grammar, punctuation, spacing and phraseology ... and I've no idea what happened to the numbered instructions 2, 3 and 4!
1. To parallelly lock the brackets tightly and fasten or loosen the screw whenever you want to adjust the height of the shaft & the seat top.
PS: To lock them firmly always to prevent from damaging the inner thread of the bracket.
Up & down moving shaft will surely do harm to the bracket thread day by day gradually.
The function of the thread is designed only for height adjustment and is "not" to bear your weight.
So locking the bracket firmly all the time is the key way to prevent the shaft from moving up and down when playing drum or after height adjustment.
PS: To add a few lubrication inside seat top bracket would be much helpful to lock the bracket firmly and keep the shaft from moving (lock bracket tightly) at the same time when playing drum.
5. Be sure to use it on the hard and flat ground .Never use it on the foam mat or softwood flooring.
This will do harm to the structure of the brace-assembling and the thread of the bracket gradually.
6. The warranty does "not" cover the result from misuse,accident,improper maintenance by user.
7. Warranty is to be free from defects in material or workmanship for one year from selling date or 1.5 year from the manufacturing date.Be sure to keep this paper before warranty expired.(warranty void if you don't offer this paper )