I am watching the series for the first time, and so far this is the best episode I have seen. It has everything I have already managed to love in the series: unique climate I haven't seen in other sci-fi shows - like blending scientific elements (other mysterious planet, aliens, ancient language), feel of mystery and military parts, with humour and its overall message about our race.
Series' portrayal of alien race - the Asgard is wonderful. It is a mixture of aliens we know from other shows, movies, comic books and video games and something new - they are not a hostile race, they are willing to help us, share their knowledge.
I am really looking forward to the rest of the series, cause I've heard it gets even better.