This is my 3rd dashcam. I'd never heard of Rexing before this. Over all, after a week of using it, I like it. There are strengths and weaknesses.
1-This dashcam seems to handle battery charging properly. It's the first dashcam I've had that does. (Strangely, my last dashcam didn't which ultimately caused its internal date/time chip to reset, which got the date set to 2015, which actually made it stop recording video: the just-recorded file had the oldest date of all the files on the sd card, so it deleted it to make room for the next file. It gave no outward sign of any problem. It's an interesting multi-step failure.) The blue status light indicates when it is charging. I haven't see the blue light since the first day or two, so it's charged all the time.
2- Video quality is very good. Viewing video taken during the day, when exposure times are short, freezing the frame gives really sharp images even while the car is moving. At night the image quality is also very good, but the longer frame exposure times necessary at night allow for some image motion blur which is noticeable only when you freeze-frame the video. That's not a criticism. It's just the way photography works (any camera will do that). They did a good job with the video.
3- The mounting system is a piece of plastic adhered to the windshield with a thin, double faced foam pad. The camera easily snaps onto (and off of) the piece of plastic. It's very compact and obscures less of your view. I guess if you want to move the camera between 2 vehicles, they'll probably give you another piece of plastic and foam to mount it in the other vehicle.
4- Having the speed and time, timestamped in the frame, is great, I think. The GPS option allows for that. It probably will always have the accurate time because (I assume) it gets that from the GPS.
1- With other dashcams I have had problems with the thing failing to record, but giving no outward sign that it was not recording, such as when an sd card failed. The flashing red light tells you it is recording so, seeing that the red light is flashing is important. The Rexing's light is very hard to see during the day (it's fine at night). The LED is internal to the unit and back-lights the push buttons. It's faint. If you could see the LED directly, as in my previous dashcam, it would be clearly visible in daylight.
2- The video display, when it first turns on, also shows you, for a minute, an animated, flashing red dot which also indicates it has started recording, but that, too, is hard to see in the day. It's bright enough, but given the shape of the camera and the mounting scheme, the display is necessarily viewed at a 45 deg. angle or more from the driver's view point. The display quality degrades badly when viewed at that angle. I guess they figure, you don't really need to look at the display except when the thing is in your hand, not clipped to the windshield. That is generally correct, except that I want to see that animated red dot since I can't see the flashing red LED. So when I start the car, I end up leaning way forward and tilting my head up to achieve the viewing angle necessary to see that dot. I'm sensitive to this issue because the last time I was in an accident, my (previous) dashcam was NOT recording, and was giving no outward sign of it. I didn't discover it until I tried to look at the video. So, the "everything is OK and I'm recording" indicator is very important. It's the whole point of having the thing.
3- The downside of the mounting scheme is that it gives up the one advantage of the suction cup mount, which is that you can move it to another vehicle easily at any time. I used to take my old dashcam with me when I travel to use in my rental car. You can't do that with this camera.
So, over all, I like it. Every product is a collection of many design trade-offs. The trade-offs they made were, mostly, reasonable.