The Tesla chargers are actually quite nicely priced, and by far the best choice if you only have a Tesla in the USA. The only reason to go with a non-Tesla charger would be if you also have a non-Tesla car. However, in the UK, this is would be less true as Tesla uses Type 2 there like the other cars. However, I presume they still have the useful NFC button that lets you lock/unlock right on the handle.