I appreciate you posting about this, and the info. I don't really love the looks of this technology (or flip up screen) in our trucks, but I use my truck enough I would really like onboard navigation and torque display capabilities. For this reason, I have a couple questions for you.
Does google maps have offline maps loaded so that it works without internet? Have you used this and does it work the same as a cell phone, etc?
Have you used torque pro on this and does it work normally/as one might expect?
I think it comes with a mic for hands free, are you able to use it in your truck? My exhaust dumps in front of the rear wheels, so between that, and all the rattles, etc, its almost hard to believe the hands free would be that clear for the people on the other end.
The only other thing I have found that seems like it might fit the bill was a pioneer single din flip up (AVH-3400NEX) that seemed to have good reviews. It has android auto, so a person should be able to display maps and the torque app that way. It seems like the android device you got has more features for a similar or even lower price. Someone with an OBS actually installed it in there truck and loaded pictures and gave it a good review.
I will do my best to answer your questions.
The unit has a pre-installed navigation app that works quite well, there is also a GPS SD slot for different navigation options, I have not tried this yet. I installed the GPS antenna behind the rear view mirror.
You can use google maps if you have data or pre-download maps, the installed app has worked quite well so far, and the maps can be updated I have read. Not sure how that is done yet.
It works very similar to a phone but is a little different.
This works with Torque. Also has a version pre-installed. Android auto will not work with Torque, you can mirror your phone and get it to display that way. To much hassle in my opinion.
I use the OBDLink MX and linking it to this device was not very clear. If you get one and have issues linking your device I can likely help. I have my phone and the OBDLink MX linked at the same time with no issues.
The Mic. This works surprisingly well, My wife says she can hear the truck in the back ground barely it is not bad at all, better then my plantronics hands free device. Your mileage may vary.
My truck has the Roll-A-Long package with the overhead console. I mounted the mic in the console, closer to me and farther from the engine. I have a 5" exhaust also, but with a muffler it dumps in the same location as stock. My truck does not really have many rattles.

Also when I installed the new ZF, I installed a sound mat over the trans, each side of the floor, front and back, and across the back wall. I pulled latex tube in the door gaskets, and installed some newer (97) valve covers as they are double wall and quieter. I will be installing some sound mat in the doors this winter to see if that will help some with the noise also.
I really wanted a backup camera for hooking up the trailers, and to get the nexus 7 off the dash for torque. I did not use it all the time but some times it was in the way.
Here is the camera I purchased:
https://www.amazon.com/NATIKA-Backu...9Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=
It has a great picture and mounting options.
I was looking at this Sony unit:
https://www.slashgear.com/sonys-new...d-unit-has-a-huge-9-pop-out-display-12587038/
A little digging and I found out that it will not work directly with Torque.
I did not like any of the flip up units as our dash has the radio set back an inch or so, this caused the screen to not set right in my opinion. Also the older I get a larger screen is nice.
Hope this helps.