I really enjoyed it. The whole double-life aspect, with constant fear of exposure, reminded me a bit of DEXTER, although without any of the black comedy aspects. And whole family dynamic is nicely complicated; I liked the way "Elizabeth" can't stand that her own kids are growing up to be patriotic, Reagan-era Americans, who think of Russia as the bad guys. You can practically see her biting her tongue all the time.
Meanwhile, the dad has obviously gone native . . . .