Overall G1W-series are good value for money, but now it has been nearly 2 years after 1st release and unfortunately some factories started saving on hardware, - there for you read some negative feedback. It is sad that in many cases resellers dont know from which exact factory they are getting their stock. Only trusted, reliable resellers can guarantee you a piece of mind. Buy locally with local warranty, the you safe.
If you are Android user, then get Mobius. As
@GJHS mentioned, you can easily watch, download, play around with setting. Mobius has one of the most advanced Android GUI Apps.
Another popular discrete capacitor based dashcam with screen is B40 / A118 as
@Pier28 suggested. I know your requirements were to swap between cars, but you may buy extra windshield mount bases, - this way you can start swapping between cars. B40 / A118 is good mid-class dashcam.
If you can stretch your budget a little bit, then you may take a look towards higher-class SG9665GC which will outperform most other dashcams in this price range.
What ever dashcam you decide - buy locally from reputable reseller even if they charge you a little bit more.
Overall there is a good rule: you get what you pay, but unfortunately in many cases you get even less than you pay.
As someone recently wrote here on forum: "Buy once - cry once" !