I cannot recommend this place enough! Lovely little apartment with all the amenities you could possibly need for a stay in Tokyo. We stayed there for 2 weeks and had everything we needed! The portable WiFi was particularly useful and the Netflix account was perfect after a long day sightseeing! The apartment is really well located close to shops, restaurants etc and a short walk from Sangubashi metro station (which is just a couple of stops down from Shinjuku, one of Tokyo's major stations).
Ushka was so helpful in recommending places for us to go and phoning up places to enquire about reservations etc. As a non-Japanese speaker, it was a massive help to have Ushka host us!
As coffee lovers, we particularly enjoyed the Nespresso machine!