9
I've definitely had more trouble on my PC than anywhere else, console and Chromecast have generally had silky smooth playback, which is...odd, but not odd when you think about it I suppose. I definitely do think their web player has more problems than anything else and to this day still opt for 3rd party sites generally.
'Course, I also live at the corner of my house where my router, unfortunately, is at the exact opposite end, and the extender isn't exactly paying dividends. MPC's been getting a lot more use lately as a result.