The lumbar support is slightly lacking for me, but I have dancer-like posture so it could just be my preference.
The seats are very plush and well-designed otherwise... go sit in one.
see full Subaru Impreza / WRX review
What Our Members Are Saying about the Seat Room and Comfort of the 2018 Mini Clubman
The sport seats in the basic black leatherette are nicely bolstered though not overly enveloping like seats in my FR-S. This means it hits a nice middle ground of comfort but still keeping you from being thrown around in aggressive driving. The manually adjusted seats are easily positioned to a comfortable state after you figure out which of the 4 levers is doing what. The adjustible thigh support is especially nice and not something I often see in this segment.
see full Mini Clubman review