I haven't thought about my hand obstructing the view.. that could be an issue indeed. Not seeing who's the caller without opening it could be annoying, especially without a smartwatch (I don't want one). It has RGB leds on the back, you can set pattern and color in Android for each contact, which is only useful for people you call frequently.

I'm around order 8000, they are shipping out orders around 5000, so it might be some time.