Ok so after a few days of living with it (as realistically I feared would happen) the unit has already started playing up...
For a start the unit randomly keeps changing the time and date. It seems to be that whenever you go through a couple of features (so use the CD, then go to adjust the EQ, then go to Bluetooth for example) the time then gains 6 hours...
When I got in it this morning, the time had remained accurate but the date had decided to jump to 31st of January 2014
If it was just this then realistically I could live with it, but there are several more issues too
The "loud" button on the front simply does not work at all. You can turn the loudness on and off through the EQ menu, but the actual button itself does precisely f**k all...
Also most of the time the CD refuses to eject and the unit then has to be turned off. I push eject, the CD makes a noise but no disc comes out. If you then try to go back to the CD option it tells you there is no device. You then have to power the unit off and try this again another two times before it actually gives you the CD
Finally and probably most worringly is that the unit has a habit of freezing and even superimposing menus over the top of each other. It has a calibration setting tool that renders the whole unit useless. You track the calibration, then when you go back to the main screen to try and play a CD for example it just keeps performing the calibration tracking lines over the top of whatever menu you are in.
This has happened every single time I've tried to adjust the calibration.
Again, only way to stop this is to turn the unit off and leave it for a few seconds.
I've emailed the seller and to be fair they have replied very quickly, although they have said that they need me to send them a video of the issues so their "engineers" can see exactly what the problem is (which I've done)
Will post again when they have come back to me but at the moment it's looking like cheap Chinese rubbish is living up to it's name...
Oh something I've noticed is that you can only have one phone connected to the unit via Bluetooth. In our A6, the car automatically pairs to either mine or my wifes phone depending on who's in the car.
With this unit you need to reconnect the second phone if you've connected the other in between. Ie, it automatically connected to my phone each time on Friday and Saturday. My wife drove it on Sunday and successfully connected her phone yet when I've driven it this morning it's now "forgotten" my phone.
To be fair, this isn't a fault as far as I'm aware, it's just the way the unit works (or rather doesn't work!