I am very Happy with my unit.
My unit has a 4G dongle built in. I was unable to see the sim card but found out online you had to insert it in a smart phone, remove the pin or unlock it, reboot the unit (with a needle in front hole and it worked).
I have a data only sim from Aldi, data over 365 days.
I have installed Oziexplorer, Exploreoz, Wiki Camps and Camps Australia among others. No sure about Hema program but I use the Hema maps in Oziexplorer.
The unit comes with a working copy of Sygic. Seems to have the latest maps.
In the end I did not need parts from Carbon. When I got the parts (reversing camera connection) I realized that the unit already had the correct connection, so was all plug and play. I thought I had a factory camera that needed a 12volt to 5 volt reducer but it turned out to be an after market one fitted by Toyota.
I watched this video a few times
https://www.youtube.com/watch?v=0XTlMtDezu4I'm not mechanically minded but it was a breeze. Would recommend one of those forked dash removing tools.
A bit different as when you remove the unit there is no need to fit the brackets back in. I don't think they fit anyway. The unit is single DIN and every thing just clicks back in attached to the panel.
I fed the TPMS dongle and 4G SIM holder into the glove box. The GPS and 4G antenna onto the dash .
There is no GPS info on the dash between speedo and rev counter. Sygic has a window with the same info in it, still playing with it.
The right hand bits on the steering wheel work but dont show any information.
Hope this helps. Would I buy another one, at the moment yes. I have joined a facebook joying auto group that has a lot of info
The OBD2 sender that I use is a wireless one, not Bluetooth.
I am still not sure about number of bluetooth connections. I have my phone connected to send and receive calls via unit and I think it only allows for one bluetooth connection.
Phone on bluetooth, OBD2 on wireless and data on 4G Google maps etc)
Still playing with it as there are a million settings.
Bob it has a Glonass GPS system.
Cheers Danny