The clock makes a high impression, the display is quite large and legible, but only if you really frontally located in front. From the top of the side or in low light, it is difficult to read. Given the price to get over but.
The function opens up more or less by reading the instructions and try around a bit. So easily I do not find the need and at each operation, the back is a few days ago, if necessary, re-read the instructions.
What really bothers me is the display of the current function. It is not really sure when the device is working. You change a button between the states in the following order:
On Car OFF-car and over again ...
Man caught now the "Auto" to "OFF", the automatic is not, although it is set to Auto (but on the wrong car). This is confusing and leads, if necessary, to the fact that the automatic then does not go. Logically would have been auto-ON-OFF. So be careful and try for now. I have just checked again.
Overall, I can not quite get used to the device myself.
Incidentally, it comes in a hard transparent plastic packaging that can only be opened by force and scissors. Older people with less force could fail. ME completely unnecessary.