Not compatible with Sony Xperia Z3 / Z3Compact :(

Installation in my Golf 4 was smooth because I had never done that but, a pair Youtube tutorials were needed.
Operation is intuitive and the buttons are well made, only the knob could be rasterized little harder, but this is not a major problem. The sound is also very good and there are also here many settings.

At first I had used it with my old Samsung Galaxy S2, which also works fine. A few weeks ago I bought myself a Sony Xperia Z3 Compact. The new mobile phone, the Bluetooth connection is working but not well. Although in about 50% of connection attempts is noisy display and mobile music, but without sound. The result is that I usually need 2-4 attempts, until it runs - and that is simply an absurdity.

I wrote to the support and this has meant the Sony Xperia Z3 Compact would not Bluetooth compatible. (Compatibility can be checked here: [...]

If I could, I would send it back.
I just hope that that is fixed in an upcoming firmware update (until now not the case)

It's a pity because it's a super radio actually.