Just got Spotify with v10 on my 2013 S last week. I have LTE. I signed up for the 3 month premium trial, and will cancel for sure if the poor performance continues. The player hangs often and I get the spinning wheel o’ buffering. It will play for a few seconds then buffer for a few minutes. If I switch to radio then back to Spotify, it seems to help, but then happens again randomly. Slacker works just fine, so it doesn’t seem to be a streaming problem.