I stayed here for a week in February and I would likely stay here again - just knowing that the breakfast that is supposed to be included is a stack of Starbucks cards, $1,000 yen for each night you're staying. The shared dorm featured guests of all ages, not just the college/party aged crowd, and there was a mix of foreign tourists as well as locals in the 6-bunk landing where my top bunk was. Laundry worked well - make sure to bring your own detergent, there is none available in the laundry area that I saw.
There are very few trashcans, and it's sometimes confusing, looking at some personal possessions on the shelves, if departed guests just left that behind (which turned out to be the case) or if it's someone waiting to pack them and storing them there for a bit. Bring your own hanger, just in case. Next time I would buy a "cabin" style bunk, as it would allow me to store my suitcase in the little walking side area near the sleeping bunk, and they get a little mini-shelf under the cabin for storing something like shoes or a small bag, too.
The lockers are TINY. Not big enough for a laptop - barely big enough for a small purse and your phone to be tucked away safely when you take a shower. Shared bath (separated by gender) is really nice - great toiletries (shampoo, conditioner, and shower gel bottles by each shower faucet) and great water pressure. Soaking bath divine.
Bath and face towel rentals available through the front desk. Bring your own slide sandals/shower shoes.