conditionally recommendable 5

Bought 2 chairs, on both the same problem ----- the roles within the shortest time defective (break in the tread). The company wanted to reverse the burden of proof in the warranty period, impudence !!!
Back problems can be of prolonged use, so dear finger.
Replacement of the (identical) roles are also broken again. Allegedly, there is no other, so for the fitting well, use only not too often or permanent payload