We loved our time in Komagome. The neighbourhood is outstanding. We have three kids and they felt so safe and secure. There's a playground just up the street and they popped down there alone frequently. There are also great restaurants and bars nearby and being located so close to Yamanote line plus metro makes it very convenient.
The apartment itself is fine, has a traditional bath. A bit squeezy for 5 people, but in Tokyo you have to expect that.
We'd book there again in a heartbeat.
This little neighbourhood is a gem. We adored every minute.