It works but...
Initially, the cables were reversed compared to the instructions. If you follow the instructions exactly, it won't work. I accidentally discovered that they were reversed, and it didn't work because I had already changed two devices, as the first one had a crooked screen inside and both cables were reversed. Overall, the quality is not great, but for the price, if it works, it's fine.
Secondly,
It drove me crazy during the summer.
Basically, every time you leave the car in the sun and it heats up, it goes crazy and shows random things. Now, during the winter, it rarely confuses me, but it still happens occasionally.
If you want something more reliable, get another device.
It's only worth it for its beauty, but what's the use if it doesn't do its job correctly.