I have it plugged in my car, works fine, sounds great!
BUT the charging isn't really fast as I thought it would be (it's not my charger or my car charger thingy, because without this adapter, it's super fast!)
And as for calling, it does not work and I can't be heard, so I still have to use my speaker, which sucks.
Overall, the sound is good, charging is good for keeping the battery level steady, but if you're expecting fast charging, it's not happening. If you call you have to use the speaker or to ear.