Works great on my Formula racer chair purchased in 2016 (almost 7 years ago). Also purchased on a Friday morning, delivered on Monday.

Packaging is top notch, and well thought out. I was pleased to learn how easy adjustment levers are to access (rock, tilt, raise-lower, lumbar support).

I'm a digital designer/artist and business owner. I spend hours on the computer daily. I have scoliosis and arthritus in my low back. I have spent thousands on chair/props/supports anything to just be comfortable sitting. I have a desk that adjust to a stand table. But nothing I mean nothing has changed the game as much as this chair. When they say everything actually adjustable they mean it!The cushions material is so supportive. I don't even need a back pillow(still ordered one though it was cute). This chair has quality. Real true quality, it was made with real humans in mind of all sizes and shapes. They cared when they designed this product. And damn they did an amazing job. If youre debating because its hard to spend a lot of money and a gamble. Trust me, ive been buying chairs for at least 15 years. THIS IS YOUR DECIDING FACTOR. get it. Worth every penny and then some. The assembly is a peice of cake.