ZeroCool112

Alright, call me an idiot, but I need some help? I'm very new to the mesh networking scene, and I'm considering investing in a set of 3 Google WiFi devices for a mesh network. My question is this: When all three are set up (without interconnection with an Ethernet cable) do two of the three act as repeaters, essentially halving my internet speed? Or do all three somehow magically act as independent routers, allowing me full speed on all three..?