We stayed for 14 nights at Mystays Kanda in april 2018. For us, a couple in our thirties wandering around all day and only needing a room to sleep and shower in, this was the perfect place to explore and enjoy all of Tokyo.
The hotel is only a 5 to 10 minute walk - closer to 5 min. - to Kanda Station and where you can catch the Yamanote and Chuo lines and the Ginza subway line to reach all parts of the city. You can walk to Tokyo Station and Akihabara as well (both one stop away). There's also a stop on the Hibiya line around the corner (Kodemmacho) for going to Tsukij, Roppongi, Meguro River, etc. FamilyMart is next to the hotel, Ministop, Lawson, 7-11 are close as well.
I know a lot of other travelers prefer the Shinjuku or Shibuya areas to stay in, but we wouldn't like that, although we love these neighborhoods a lot as well. We just like it that the Kanda area is far less busy in the mornings and evenings, and that the train station is quite small, so it's very easy and efficient to get on a train every morning, no matter where you want to go. Still, there are tons of good restaurants and fun (craft beer) bars in Kanda and near the MyStays Hotel (Yuno Yuno, Craft Beer Market, a great gyoza place around the corner.)
For the room, it's certainly not big, but we didn't find it to be very small either, according to Tokyo standards. Even with a queen sized bed in the room, there's enough space. We are both tall Dutchies (1.90 and 1.85 m.), but we don't carry around huge s