Overall I was kinda "eh" about the episode, it had parts I liked but it didn't quite hook me like other episodes have. The relationship between Dreamy and Nova felt a bit rushed, both in starting and ending. Why did Dreamy give up without more of a fight? He was different from other dwarves, maybe he could love. I did love how Dreamy's pick-ax broke, as that shows that "Dreamy" is dead, since the pick-axes are bound to their respective dwarf. "Grumpy" couldn't use "Dreamy's" pick-ax. This story isn't over though, Grumpy still needs to get to the jail cell where he meets Snow, but that will probably be a future season.
In Storybrooke the same sort of thing happens between Leroy and Astrid. She spills some glittery stuff on him and he falls in "love," with a nun... Mr. Gold's refusal to help the nuns is explained a bit by the fact that most, if not all, of the nuns are/were fairies, but that begs the question why doesn't Rumple like fairies? We have already seen him kill one in the Cinderella episode.
One of the gems in the episode is the scene were Leroy goes up to a roof and Mary Margaret follows him thinking he is going to jump. When she says so he replies with something to the effect of, "What? I'm not going to jump. That's crazy!" He then cuts off the electricity so the people have to buy candles. The Miner's Day Celebration also echoes the symbiotic relationship between the Dwarves (miners) who mine the diamonds and then grind them into dust for the Fairies (nuns).
It pains me that Emma is beginning to doubt her super power, because Sydney got those records from Regina so they could be faked.