Originally Posted by PropellerHead

This looks close enough to the others like Eonon that it is likely produced and sold by the same ODM. In these units, the OS and other features are really the only difference between one brand and another. Function follows these differences of course, so some difference can be inferred.

I put an Eonon in my wife's E46 last week. For less than $300 it is something I would do in my E53 without a question. It's not perfect. It's not always the fastest experience. Today, for example, I had to manually launch the radio app on start. I'd played last night with Torque Pro and a Bluetooth OBD2 reader.

As long as you enter ANY device with a clear understanding that no seller anywhere has suggested your experience is anywhere close to OE across:

• fit- I had to file some plastic on install
• finish- the glare makes the screen unreadable @ times
• function- goofy things like manual start of radio. Buggy software reminds me of an Android phone from 2012

But.. neither are the things they *can* do:

• Real Bluetooth function- clear, nice volume calls and music streaming with data on head unit
• Google Calendar- my family life runs on a series of calendar events to keep us on the same page.
• Any Android app- My smart home app runs from my head unit
• Rear Camera- never offered in an E53
• Updated Navigation- Apps and maps of your choice
• DVD AV out- Easily hook up rear seat video
• Screen cast- cast your android or apple phone to your HU

The value assigned to that additional function and to the troubles they come with are for any of us to assign for ourselves.