I have used both Boost and Google Mesh. Both were easy to set up, and worked well, however, the difference for me was the Boost system extends the Actiontec network, whereas the Google devices were on their own subnet. This meant my hardwired devices did not easily connect to my wireless ones, and I needed to add additional switches, etc. to get my network devices talking to one another.
Remember, with any mesh network, it is bes to have the primary point at the centre of your topology to reduce the number of hops. Can you run Ethernet to a central point in your house?
I have the Boost system to give me coverage to the back yard and Google Wifi coverage on the front yard. The T3200m is generally sufficient for inside the home, but the mesh allows the yards to have coverage when I'm outside.
I am using 2 Boost nodes and 3 Google nodes.