No, it is not a good dash cam.
Because of overheating issue when charging the battery and recording at the same time, Hawkeye has decided not to charge the the battery when the cam is recording. But in the car drive mode, the cam is always recording and the battery will never be charged.
So, after a certain time, the battery will run empty. The cam records when ignition is set to on, but when you set ignition to off, the cam has not enough power to stay the 30 sec. on, save the file and shut down correctly.
This results to a faulty saved file, and the next time you start your car, the cam asks for repairing this file (but you can't) and is NOT recording.
You can use the 8S as a dashcam, even without the battery, but you have to stop the recording manualy before switching the ignition to off.
For me it's unusable this way.
If Hawkeye would publish a firmware version that allows the cam to charge the battery for 1-2 minutes although it is recording, the problem would be solved. 1-2 minutes would'nt cause overheating and after that there would be enough power for the 30-seconds-recording, the saving of the last file and the shutdown.