Poor service , Nation wide warranty is just joke . They put 2 liter extra oil in my car , I went to their two autocentres in reading both centre did not bother to even check my car and did not offer me to book a time even , but told me to go back to borehamwood centre to get it checked and fixed . I ended up paying extra money to BMW specialist for removing this extra oil from my car , When i went to their borehamwood centre for complain,one their Engineer misbehaved with me and threaten that he will ban my entry in autocentre , this is the way they are treating their customers .