This adapter has absolutely convinced me. He actually invites (With me: Galaxy S3 and Galaxy S4) 2 smartphones simultaneously with maximum charging current. This is not self-evident. I had the problem with some adapters that while navigation smartphone was charged very slowly. In addition, many adapters have been extremely hot. The MPOW adapter remains lukewarm with 2 smartphones.
Its design is very well done, as it is hardly noticeable in the car. The blue backlight is very discreet and does not bother.
He also sits very firmly and the first time can be a little hard extensor USB plug, but this no longer occurs after a few times of use.
For these reasons, I think 5 star for absolutely justified and give an unqualified recommendation to buy.