They are comfy, good side support, a doddle to fit, they flip (3 door ones), have a massive front to back movement and they are small enough for a mini.
By small enough I mean they are not too thick in the backrest, so they don't kill rear seat room. And. They are not too wide! So you can put them in a position where your passenger isnt shoved up against the window, you can get your hand down the middle easily to recline them. And when they do recline they dont just recline a bit and then wedge against the companion bins. They actually recline!
and their size looks right! and the covers are a simple pattern so anyone with some scissors, a sewing machine, some new material and a brain can re-upholster them however they wish
Here's some in my old tatty City I had a few years back. These are in their original metro trim.

Al