My girlfriend is a huge Flyers fan but we live in Flemington, NJ and there's a strange TV rights thing here. Flemington is technically part of both the Philly and NYC/NJ markets, so we can't get Flyers games on Center Ice or GameCenter since we're "in market", but our Comcast TV signal is run from Hillsborough, NJ which is only in the NYC/NJ market and doesn't get CSN Philly..
So we are basically in a Flyers dead zone and the only way for her to get games on TV was via hockeystreams. We really enjoyed it last season and will purchase the 6-month membership again in early October.. Quality was definitely solid, all games were in full HD and it only paused 2-3 times per game (we don't have a very high internet package though so that could be the reason).. I highly recommend getting it to watch Flyers games