This was my second time staying with Mitsuko, this time a different apartment in the same building. Mitsuko was nice enough to let me drop off my luggage as my flight came in early morning and I'd hoped to head out to amuse myself until the evening and then check in but didnt want to drag my luggage with me so that was very helpful. The apartments main room was quite airy and bright and table and chairs were very useful to sit and eat dinner at or just generally to sit at when not in bed sleeping, there is a large built in wardrobe that will house two suitcases quite easily which is very convenient to not let the room build up with worn clothes/laundry and so on. The bathroom was similar to the apartment I stayed at last year, I'm fairly small for a foreigner and still felt it was on the cosy to cramped side but luckily enough the whole bathroom is basically a wet room anyways so just shut the door and get washing (you'll probably need to do this to be able to sit on the toilet fully anyways) this wasn't too much of an issue for me but if your on the larger end of the scale (either height or width wise) you might struggle with this bathroom, just something to think about. The apartment is located roughly near Hatagaya main shopping street so you have access to pretty much anything you want food or grocery wise as well as a drugstore and other useful essentials, you also have your choice of pretty much all the locale combini places with a lawson, mini stop and 7-11 all within a casual walking distance.
you also have plenty of choices of late night food and bar places (my personal recommendations being either torikizoku or Cona pizza, both places have good food and drink and you can relax well into the early hours with friends for pretty cheap without worrying about how you are going to get home.