@fintt987, it's been fine. Performs much better than a £120 unit should.
After a few months usage, I will say the following. I definitely prefer the sound over the Concert unit, but as the OEM amp and speakers were retained I am assuming this is because of the flexibility of the new EQ against the pre-EQ'd/limited tone controls of the Concert unit. I like a bright treble, but for the first time I've actually EQ'd the higher frequencies below 0.
I had to replace the aerial adapter after a few weeks, as there was distortion even when listening to strong stations. It's been OK since. I do miss DAB though, as this unit only has FM/AM, and there is no neat way to add it according to Atoto support. My car doesn't have steering wheel controls, and Atoto sell a unit that straps onto the steering wheel. It's ugly as hell though, otherwise I'd have considered that.
Despite driving only 1500 miles this past year, I've used Android Auto a good few times. Mixed results, but mostly good overall. It works every single time, and allows full control of Maps, Spotify, TuneIn, Messages, News etc. but has frozen on a few occasions - once while using Maps and I missed a junction. Each time all I did was press the Home button, then the Android Auto icon and it all returned. Navigation was maintained and the correct music source/song etc. Not the biggest hassle, but a glitch nonetheless. Whether this can be attributed to the head unit or my phone, I cannot confirm as I only have one phone. The manual states that the original USB cable supplied with the phone should be used, which I do. But the sheathing on this is split/open at the phone end which may be affecting connection. I don't have Apple, so cannot comment on CarPlay.
Other points... The unit has the facility to remember the volume of each source separately, which is very useful. 'Panel illumination' is misspelt in the settings! The reverse camera annoyingly overrides all other controls. The volume buttons are physical buttons, but they don't work when the camera is on. If you have steering wheel controls, they may work, but the buttons definitely don't. Unlike the OEM installation, the unit switches off the instant the ignition is off. I'd prefer to be able to power it up with the ignition off whilst parked, but this isn't available. That's all I can think of for now. All from memory as I haven't driven it for a couple of weeks!