Strangely, the (long) opening story with the fire at the library wasn't particularly dramatic compared to the rest of the plot of this episode, maybe because the outcome was so predictable. But it did introduce later happenings, such as the housefire and Hawkins' further secret activities, which turned out to be quite compelling.
I was also impressed with some of this episode's attention to detail, most notably when Eric blew out the candle as the family left the house. These minor additions go a long way toward making the entire scenario more believable and sympathetic.
Overall, I'm a little concerned about the uneven pacing of the series so far, but unless it really takes a turn for the worse, I'll still be watching.