Bought this for a 4th floor master bedroom of about 350 SF (went with a slightly bigger unit since we have vaulted ceilings and an exposed stairwell) . It was an easy install - just had to cut a 2x4 for under the front of the unit to make up the gap between it and our windowsill. The only thing I didn't use that came with it was the screws to secure it to the windowsill (used 3" wood screws as I had my own circumstance with the gap mentioned earlier) and the foam they provided to close the gap between the two window panes once opened. I bought thicker foam as what was provided didn't fit. It has worked wonderfully for our room, and connected just fine to our wi-fi and google speakers. Not sure what people are talking about with wi-fi issues but ours was fine. We have a wi-fi hot spot in our room too. Overall, great unit and cools as advertised. Has made a tremendous difference in a hot 4th floor.