I have a Nextbase in the Omega. Pretty good for the money imo. 
It doesn't have a rear facing feature, just films whats happening through the windscreen. I originally had it in the 190, but it interfered badly with the DAB signal.
The guy at the electrickery shop said that the Nextbase duo type are OK for this. It was only the separate rear ones that they found interfered with the DAB. Is the 190 DAB aftermarket? If so, that may account for it, as I would assume built in models should have better screening.
I can see a good case for not having GPS built in, so will investigate at a dashcam shop, Halfords(?), as I may get something off with their TC. I understand that some NB models, possibly all, can be swapped to another vehicle quite easily.
