We have been using the N1 for a few years now and are very satisfied.
For the money, it has everything you need in this price range.
In the VW bus, we have then test on the N4, when that was once on offer.
There were some problems at the beginning, but Vantrue always solved them very quickly. Allersings was the communication scho not without. One was a bit suspicious. I had to install the latest driver and upload a "proof video" on Youtube, which they then watched in China.... Apparently, the service in China is quite continuously staffed, but communicates only in English by mail. But everything worked out - device was returned free of charge from us and I got a new N4.
Safety matters. We believe a dash cam with top quality and strong performance is very necessary for every vehicle driver nowadays. That's what we do at VANTRUE, developing high end dash cams and providing top level services.