I've been using the chair for the past week, averaging seven to eight hours per day because I now work from home. I feel quite good after a lengthy day of sitting. Overall, I was extremely satisfied with the chair

It really is extremely comfortable! When I sat down for the first time, the chair really was an experience, it felt as if my tense back was loosening.

I have an older model (~8 years) and one of the wheelbase arms broke off. DXRacer was responsive to my email question and told me which base would work with my model. If you're looking for parts, the links can be found in the FAQ question: "If my chair's warranty has expired and I need to purchase corresponding parts, what should I do?"