In general, Kaadas is fine.

As a brand, I dislike the practice that they were promoting themselves as German lock initially.
However, it seems not much reviews on inferior quality for this brand. In short, Kaadas produces quality lock.

As for models, those on sales in Malaysia are older series.
Those in China are much more advanced.. Or some may claim gimmick features.

Please evaluate your requirements.
For example, some people prefer wifi feature but I'm against it because it's a rarely used feature and yet serious battery drainer.
Some ask for fully automatic lock but I prefer semi auto for better motor lifespan and battery performance.