After reading the negative reviews my expectations were not very high, but I'm pleasantly surprised.
The smartphone (without shell) securely locks into the dock. The best way it starts a little off-center, and then pushes it over the middle. The smartphone slides easily in and the dock will not move. It clicks signaled on the smartphone that is charged with the engagement of the contacts and the LED.
Since the dock is very easy, it takes off with. when pulling the smartphone. This can be very easy to prevent by grabbing the phone from above and behind the dock easily pressed with a finger against the table.
The handling is so simple and reliable that it is also in bed (so lying and in semidarkness) makes no problems.
The charging time seems to be the same as with direct USB connection. The standard charger that goes so quickly.
For the material value the dock is quite expensive, the gain in comfort is the easy but worth it.