Deko's place is clean and convenient! The train station is very close and a Limo Bus to and from the ANA Intercontenental hotel is available from Narita Airport. The walk from this hotel to Deko's place is about 10 minutes. If you have a lot of luggage, then a taxi from the hotel to the apartment is about 410-760 yen. Very much worth it if you are tired after a long flight as it is uphill most of the way from the hotel to Deko's house.
Check in was very easy and convenient. The other guests were very quiet. There is some construction going on across from the apartment, but it is understandable that this is not something she can control, and it is only during daytime working hours.
Roppongi area is a bit of a partying atmosphere, so the early morning hours on the weekend can be a little noisy with people and especially the high performace cars that youngsters want to show off by revving up the engines. Most places in Roppongi have this same environment, so know that being in the middle of the nightlife means being "in" the nightlife.
The large mattress in Deko's place is EXCELLENT, and the pillows are also very good quality and comfortable. The mattress is very close to the high quality one I have at home so this alone made Deko's place worthwhile. I was able to sleep comfortably and soundly on it.
The apartment is decorated nicely, and she provides some light snacks in the lobby outside the apartment for guests. The washing machine is very quiet also.
I would consider staying at Deko's place again on a future trip.