A:Answer While 23 Mbps is relatively slow these days, it can work for streaming some devices. Two or three big-users at the same time may still be an issue. It would depend on the layout of your house, and the relative locations of the three devices. The key is the placement of the beacons so that they help satisfy everyone's needs. All you can do is try. If it doesn't work, send it back.
The reason Eero exists is to eliminate, or drastically reduce the signal-loss. In my case, it does an excellent job of maintaining 115 Mbps throughout the house, and garage.