An 80's movie dream is playing out for some rural kids, where they stumble upon a smouldering high-tech wreckage and as they explore it, men in suits pour out of black SUVs and talk to them in taciturn ways. Seriously though, these jets sound terribly overpriced for how unreliable they seem to be.
A broad overview of my understanding of the situation: Most critics are making unfair comparisons (e.g. criticizing the F-35 for its inability to dogfight, or comparing its cost to 4th generation fighters, rather than its 5th generation peers)
This argument is further complicated by (as I understand it) a general lack of knowledge in the west concerning the true cost of Russian and Chinese 5th generation fighters (PAK FA and Su-57)
All of that being said, I think this is a heavily politicized topic, and I can never discount the possibility that I've been hoodwinked when it comes to such matters.