Had not seen a thread for this yet,
I see some definite consumer advantages with Sprint's Network combined with TMob and Wi-fi.
I have had many Nexus devices and I love my Nexus 6, although it is a bit big.
The price is good for the service. ($20 / unl talk/txt, $10/gb)
I hope the technical aspects work as they propose. I am a Google Voice Number user and love the "Any device" call capability and use it on my Tablet, Chromebook and phone. I rarely actually answer my Phone at the house. Answer the tablet or Chromebook.....
I love Sprint's network, the upgrades they are putting forth and this Site, but if Project Fi works as advertised, it might lure me to sign on.....
I go My magic box 2 or 3 months ago and it was working, then I was in bed on my phone it suddenly stopped, reset it then error 245 came up. MB technical support said that the tower near me wasn't compatible with the magic box, how do they explain the fact that it was working for 3 months? Their site now says the magic box isn't available in my area. Getting a replacement soon.