I have purchased at least 10 chairs from this company.  Overall, it's a good product but when one breaks (and two have so far) it's really difficult to get parts.  One chair has been in our back office for over six months waiting for the correct parts to replace the broken ones, they finally just arrived. Parts were ordered over six weeks ago for the other one and still no parts have arrived.  When they described "lifetime" I assumed they would last more than 2 or 3 years and the parts procurement is horrible.