The price point is awesome, but I wonder if they improved the sound quality at all. I have 1 Dot and 4 Echoes. Had a 2nd dot but its just so damn tinny it hurts my ears, so I gave it away. IMO the echoes sound a lot less battlestar-galatica'esque.
Sure, the Echo is far bigger, and has no audio output, but I have in-ceiling speakers and a Sonos Connect hooked into them so I just have it start a Spotify playlist on those. I have the one dot velcro'ed onto the wall like the other posters, about 9" from the corner, works fine.
I am happy more people will be getting these, using it to startup HA stuff has gotten us seriously lazy. I barely use a phone UI anymore, I just ask Alexa and she responds with the answer.