The advantage is its proximity to Ueno Station.
Another advantage is that the room itself is quite clean.
But, the downside is that there is no staff permanently at the front desk, making it difficult to get assistance or communicate. In particular, there is no staff at all between 12 p.m. and 2 p.m.
For example, on the day of check-out, you can't even enter the building to retrieve your belongings during that time, which is very very inconvenient.