This is said to be «a wildly popular launcher», and thus with Nova Launcher Prime you get «extreme customisability of the Android experience to suit every taste and need». (itwire.com)
They also all offer extensive customisability options: (daytrading.com)
As for exterior customisability, the C - pillars and rear bumper of the MINI Clubman can be had in either Silver or Black, while the roof can be ordered in either Silver, Black, or body colour. (paultan.org)