We had a great time staying at AltStay Yotsuya. The place has much more space than typical hotel in Tokyo, and it has all the basic appliances (e.g. washing machine, hairdryer) you need during our travel. We loved the bathtub with automated water dispenser and temperature control, it's great for some relaxation after a long day out. The couch had some tiny stains on it, but it is very minor and it was overall quite clean. This place is conveniently located (around 5 mins walk) to a Metro subway station. (Note that if you have JR pass you will need to pay for the Metro subway lines). The electronic door lock and entry system is very convenient and does not require the use of a physical key (one less thing to keep track of while travelling). Overall, we were very happy and satisfied during our stay here and would recommend this place to others.