The appartement was really nice. It was clean. It was Big if you consider it's in the middle of shibuya. The equipment were great. The host is great, he offered us gift and a cup of tea while recommending us place to see. The host staff was really nice, help us with our luggage (get them to the appartment and to send them with ta-q-bin). As for the location you're in the middle of shibuya so have everything just a couple of minutes away.
Now with this advantage their is inconvinients : the noises, and the lights. There is bar jazz bar downstairs with concerts and people making noises all night.
Another problem is the lack of elevator (the room is on the 4th floor).
In conclusion if your are a heavy sleeper or you are here to go out all night and don't mind taking the stairs, this is a really good appartment with a perfect location and a very good host/staff.