I've only seen the first two episodes, but I've gotta admit I'm not loving it. Morena Baccarin has never appealed to me as a particularly good actress - even in Firefly she was probably my least favourite of the main cast - and they've hamstrung a big chunk of her main appeal (hotness) witht hat haircut. In fact, the only one who I've actually liked is Alan Tudyk, who I've liked in everything I've seen (admittedly, only this, Dollhouse and Firefly, but still). Other than him we've got a bunch of vague motivations and underdeveloped characters and a similarly vague sense of menace that just isn't carrying the series well enough for my liking.
Willing to give it a few more weeks though, see how it goes.