Review (4/5): Works good but instructions are very poor.
The cameras work great, both front and rear in the 6 weeks since I got the dash cam. I only installed the rear camera a week ago because of the difficulty running the cable to the front. That would be the same with any camera unless it was wireless. Installation depends on your ingenuity to run the cables. There are basically no installation instructions.
The operating instructions are in Chinese and translated to English. In addition they are cryptic. I have experimented to find some of the functions but only on my own.
If the instructions were good I would give it a higher rating.