There are few brands that I think hit the bullseye as directly as SONOS.  I love the thought that has gone into every element of their image and voice.  It's manifested in the products, which have a beautifully minimalist aesthetic.  Few buttons.  Simple choice.  Neutral form.  It's the auditory cues that they use to indicate welcome.  It even goes as deep as their choice of a smooth palindrome for their corporate name.   All touchpoints indicate what the brand stands for, simplicity that integrates perfectly into the environment.