Very happy with this air conditioner. It took a little time when first setting it up, but will be much quicker the next time.
It is very quiet. The novel way it kind of saddles the windowsill means that the window can almost completely close, sealing out more of the noise. It also means that the window is only minimally obscured and that you can open the window on cooler days without taking out the AC or it falling out the window.
We have it in our bedroom, and sleeping with it has been excellent, both in terms of temperature regulation and noise level.
I haven't used the smart connection feature yet, but the built in controls are easy to use and seem sufficient for the majority of the time.