The case I feel with approximately 10.5 x 6.5 x 2.9 cm still quite compact and could easily be stowed in the luggage. This one has then separately yet the connection cable, which also gives me a length of about 1 m one useful for hotel rooms range.
The device provides 60W, this would correspond to each port 2 A. Thanks to the control electronics but can also be up to 2.4 A can be provided when it is less required a different port or nothing is connected. Even when fully occupied ports, the temperature of the housing was still okay. In operation, a blue LED lights.
Conclusion:
The USB charger has convinced me and made a good impression.