I have had this car stereo installed in my 20-year-old Focus for a couple of months now. It's double din but it seems Ford's version of double din is slightly different. I had to 'modify' the dash bezel to get it to fit, that is nothing against this device.
For the most part it's been excellent, I'm far from an expert in installing something like this but have it running with all bells and whistles (bluetooth, wifi, backup camera etc.). Having it display battery voltage on the main screen has been incredibly valuable to learn and understand the power consumption.
I don't believe you can use this without the engine running for too many minutes before it bleeds too much juice from the battery, having a visual display of the voltage is so useful, it could just be my car and/or battery but it should be no surprise it's more power-hungry than what was originally intended for my car. I have yet to look into possibly a larger battery to counter/accommodate it.
I am suspecting my starter motor may be on its way out as the 'instant on' feature is proving somewhat unreliable whereas initially, it worked great. Again, I have a 20-year-old car and am new to this type of installation, to me there may be calculable reasons for the above and I do not believe it's this device but rather my lack of knowledge and understanding. I say this as a caution to others, maybe get a professional to install and advise!
Other than that I'm really happy with it and it's a fraction the cost of a bigger name brand with all or more features and it's Android so massive potential in customization.
As for the design, having an actual volume dial was a key factor in me choosing this, the physical Home and Back buttons have also proven superior than the touchscreen options. One tiny gripe is the black outer bezel sticks out from the screen a touch too much, so when using the touchscreen on the top edge is a tiny bit awkward, but it's not that big a deal. I'm a bit of a fiend with devices, in hindsight, I would have liked 8 gigs of RAM, again not that big a deal.
There is a proper volume button. The nav button selects your chosen nav - it is like a 'home' going straight to Nav, which is useful. The little square, common to Android, of seeing which apps are open could be bigger, but it is quite usable. The GPS is tip top. I put the aerial for this on the parcel shelf.
The OBD is fun - you have to lay out three or four quid for a USB sender, but you can have all sorts of real-time dials and information on the screen. The inbuilt music app is good enough. I alternate with VLC player. I haven't used the full 128gb in memory cards yet. Music will play from micro SD and USB. The unit wouldn't see a 64gb USB stick, I think it requires FAT32, rather than exFat. It wants to format your card for you.
There is also a proper volume button. The nav button selects your chosen nav - it is like a 'home' going straight to Nav, which is useful. The little square, common to Android, of seeing which apps are open could be bigger, but it is quite usable. The gps is tip top. I put the aerial for this on the parcel shelf.
Overall I very much recommend this Pumpkin Android 10 car stereo.