eg a Nexus 5 from 30% to 96% in less than 45 minutes - creating the fewest Chargers at home on the power socket! Nexus 7, Galaxy Tab 4, Galaxy S3 will also be perfectly realized and mercilessly quickly pumped. Can so even the battery pack effectively anchor load times if all mobile devices are actually full.
Has only plug something hard in the car let (Kia Ceed GT) but that's not really a disadvantage, he may remain stuck when it is not in use.
In short, the charger is highly recommended!