It does have rated capacity of 105 kg, may make you feel better, I am about 5'11 and around 100, the chair so far is more comfortable than the Venturi due to the cushioning. The Venturi can take loads upto 150kg. It is early days, but the Mika seems comfortable to me. Have spent about 7-8 hours over the weekend on it.
Thanks. Actually I am only most concerned about the headrest comfort and the back support/cushioning. Weight didn't bother me as much as my doubt about support and rest for my head/neck and the back. If the backrest is not high enough and doesn't reach my head/neck then it's a problem