Yup, the sales lady at Wing On store told me that the chair cost 4 grand, with 15% off. My jaw dropped.
The Tempur kneeling chair is very plain looking to me. The plastic star base looks just like the same material of the average office chair that I'm sitting. The Pneumatic height mechanism also looks the same as your average office chair. The fit and finish of the plastic and metal parts does not tell me anything about precision engineering. Sure the cushion is more supportive than my existing chair but I only managed to sit on it for a few minutes. Can't tell if it's gonna help in the long term.
Perhaps the "Tempur" foam material is the most costly one. However, memory foam cushioning is nothing new and it shouldn't be this expensive. I mean, there are just two small pieces of cushions on the chair! Perhaps the patent of this chair is the culprit.
I'll check out those Stokke online.
Exercise ball? Haven't thought of that...
Thanks for the feedback.