I have recently had poor buffering problems mainly when using Sonos system with Amazon Music. My Wi fi is BT running at 50 MB so quite fast. I dont have problems with the radio throug Sonos system e.g Gold or Smooth. To solve this I have just bought a Sonos Boost. It is much better but intermittent buffering problems are still happening. Is there anything else I can do. I am not very technical. I am running S1 with 5 speakers all 1st Generation. 3 x Sonos 5 and 2 x Sonos 3 and a Sonos Amp.