Their app is supposed to be utterly brilliant, not sure how long ago you used it.
I do have stupidly fast broadband, otherwise I wouldn't have bothered.
I currently have a Denon AV receiver and crap little Panasonic speakers with a decent sub that I got off Ears. The Sonos sub is supposed to be awesome and I now have full surround with no wires. It has 100 day no quibble returns on all Sonos stuff, so I guess if it's not that great I'll send it back.