I bought this lock for my family, and honestly, I did not expect a single new model to feel like such a big upgrade.
The first thing that really impressed me was the UWB unlocking. You just walk up to the door and it unlocks automatically. No phone tapping, no codes, no extra steps. For the first time, it feels like the house actually recognizes you, not just your device. It’s a completely different experience compared to traditional smart locks.
Using the U400 day to day has been a pleasant surprise. When your hands are full or you’re coming home tired, it just works. You don’t think about it, and that’s exactly the point. It quietly becomes part of your routine.
What surprised me the most is how much they managed to improve in one generation. This isn’t a small update or a cosmetic refresh. It genuinely feels like a next-generation product. Everything feels faster, smoother, and more thoughtful.
I expected a solid smart lock. What I got instead was something that actually changes how coming home feels