In short, suffice to say all the 1 Star reviews below are right on the money... The longer version for those who have more time: I thought I was going to get a faultless customer experience as soon as Mercedes told me my free installation would be carried out by BP, a brand you should be able to trust. And yes, if they were partnered with Mercedes, surely that's a good thing? But no!!! For full disclosure, I have already fed all of this back to Mercedes, who have stated, for the record, that they are seriously reconsidering their partnership with BP as a result of overwhelming negative customer feedback! To summarise, communicating with BP is a nightmare, because they don't! The 'self-service' survey is unbelievably un-user friendly for non-electrical consumers. Booking the final installation took forever and much unnecessary to-ing and fro-ing with a clueless call centre. The installation, by a third-party contractor, was faultless (the only seamless part of the whole process, because it wasn't BP). Finally, I went to download the recommended iOS app, however, when I read the almost 200 '1' star reviews on the app store, I decided I didn't need that problem too.