We stayed here for 5 nights, the instructions for check in is pretty clear. The place is about 10-15 mins from the Nishi-Nippori Station (JR Yamanote Line) and about 7-10 mins from Mikawashima Station (JR Joban Line). We highly recommend this place if you want to explore places around Ueno, Tokyo.
Room is clean and nice, good amenities.