Downsides to note: towels are not free. They're 100yen for a set. Meaning if you want to use a second one day 2, you'll need to pay for it. The walking space is VERY cramped. There isn't anywhere to lock your stuff and large luggage will often be left in the pathway because there isn't enough space to put large suitcases.
All that being said, I liked it here. The common spaces were pretty. 2 Toilets per gender and 3 showers meant there was never a waiting list for the bathroom. staff is super nice and friendly. everything was clean and each bunker has a good amount of shelf space for stuff. It's conveniently located, and the price can't be beat.