Much more convenient than using the docking station DK31 whose use is simple if not using shell but more troublesome if the phone is equipped with a cover or a hull despite the withdrawal of the appropriate part of the DK31 station.
My Xperia Z1 is equipped with a rigid shell with transparent access to all the traps and connectors and cable adapts without any problem to the left side part or is the external connector. The white color goes perfectly well with the white version of my Z1. Practical use in everyday life and a purchase that I recommend for a relatively fair price.
Only outstanding issue, although cable has the SONY logo on it, I'm not sure it is an official accessory since the latter does not appear on the official website of Sony Mobile. It does not question the quality of the cable that looks BE well made and the length is about 10 cm longer than the USB cable provided with the Xperia Z1 purchase.