We stayed at Yuka's for 5 days.. the first 3 were quite good (a bit cold but still not bad), but the last 2 were qiite uncomfortable.. mostly because we suspected there might be rats.. I think on the whole, if Yuka fixes the rat issue, this place was mostly good, except for some minor issues with the temperature, and trash disposal.
As far as properties in Japan go, this one was really quite big.. the location was great for exploring Shinjuku and the surrounds.. the kids play area was also much appreciated - the toys were a haphazard mix of stuff, but my 3 and 1 year old were entertained..
On to the issues..
We, like a few other recent travellers whose reviews were somehow buried, encountered a rat issue.. we had a hole bitten through the packaging of some souvenir biscuits we brought from home for our Japanese friends; the biscuits were unopened in our luggage.. once we left a banana on the table and came home to find a hole eaten out of it.. didnt actually see any vermin scurrying around, but I don't know what else bites through plastic.. this really needs to be rectified..
I appreciate Yuka (and her night staff's) effort in compensating us for the cost of the biscuits.. we were pretty grossed and freaked our over the incident so we brought our luggage upstairs and had them zipped at all times..
Heating-wise, the upstairs was good.. however, the downstairs area was always cold, even if we used the space heater and cranked up the a/c to 30 degrees.. if you really can't stand the cold, please be warned..
Lastly, we stayed for 5 days with 2 kids, so we generated a fair bit of trash, including diapers.. the bins were not sufficient to keep a our trash, and there was no option to have them emptied out.. with the rat issue, this made us more paranoid.. never had trash become an issue at a place I've stayed while on holiday..