I love this machine
I love this machine!  I love that I can adjust the top and the sides for more/less sound.  I have the top open to the lowest setting and the sides off completely.  When I bought my house six years ago there was no noise from the freeway which is about a mile away.  I'm not sure what changed, but now I hear the traffic all night long - not unbearable, just annoying.  I have been using this for about two weeks now and have been getting a good night's sleep.  I love that I can leave my window open at night for the fresh air and with the adjustment being low, I can still hear the birds chirping in the morning.
Rating: 5 stars