Nice spacious place (but not as big as the pictures look). Great location though. Walking distance to Shibuya station. If walking up Dogenzaka is rowdy, consider walking through Mark City Plaza.
I work remotely and I thought the WiFi was too slow. I got about 97.2 Mbps down and 1.96 Mbps up.
Also, the first night we found that the bed smelled really bad so we took off the duvet cover to find sweat stains. We reported the issue to the host and they arranged cleaning the next day and discounted us $30 from the cleaning fee.
While they cleaned, we had to vacate the room while they removed and added back the cleaned sheets, about an 30 minutes each (we had to negotiate down from almost 6 hours).
Everything was fine afterwards but considering that the duvet had multiple stains, I got the impression that they generally don't clean very well between guests.
Since the cleaning fee is quite high, I recommend taking a careful look to make sure you're getting your money's worth.