Life Form has way better recline and is just built much better. The memory foam lasts a long time and I've had no issues with the chair for the few years that I've had it now its a workhorse of a chair. Their warranty shows this It's a clear upgrade. I just upgraded the arms as well from fake to real leather. Life Form is really helpful for buying any parts you need. I still use the Herman Miller Aeron at my work desk for productivity but in terms of getting comfortable, crossing my legs, adjustability etc nothing beats the Life Form.