I have d-link mesh satellites, and needed 4 around the house just so I didn't have any blindspots. To show how bad they are, when my laptop is within a metre of the d-link main satellite, I get the full 150Mbs of my upstream, but 2 metres away but with line of sight, it drops to ~130Mbs. Leave the room, and it's about 90Mbs :(
I was hoping something like Ubiquiti would be something like the full upstream speed without the horrible dropout-per-metre I'm getting right now. Happy to get a few of them in mesh (if that's how they work) if I can get full speed from my office which is curretly 4 hops away.