I have two access points as well. House is a two-story, 2,590 square feet. Cable access is at one end of the house and the main router is there as well. At the far end of the house, the signal has to go through several walls, a washer and dryer, and a staircase to get to the Chromecast plugged in behind the TV against the outer wall. It is about 1 bar and I am not about to try to use it like that as it will likely stutter and degrade. So I pulled wire to that end of the house and there is a second router (in simple bridge mode) there. As a bonus, I now have coverage in the upstairs master bedroom / bathroom where there was basically no signal before. BTW, this isn't a single router / brand issue. I have used about 7 or 8 different routers - all sorts of brands from Linksys, Netgear, Buffalo, etc. and they all had the same issue getting to the other end of the house.