an alternative is use EZCast with Tronsmart dongle (from China) but it kicks but until Chromecast can do full mirror. Very little to no lag. Best i;ve used. I use both Tronsmart with EZcast & Chromecast to watch different apps.
US Marine & OIF Veteran
Phone:Sprint Note 3 (N900p KK 4.4.2)
Tablet: Samsung Galaxy Note 12.2 LTE (Verizon P905V)