I just finished the first season the other day. Pretty cool show. Tatiana is amazing in this role, and you can easily forget that she's playing multiple roles because they're all very distinct in personality, mannerisms, etc. She does a better job at some of the characters than others, but the core three of Sarah, Allison, and Cosima are all great. Sarah is probably my favorite; she reminds me of a Lisbeth Salander-type lead.
The supporting cast is kinda hit or miss. Some, like Fe and Paul, annoyed me at the start but ended up growing on me. Others I'm just not feeling. The worst is Art, who I just can't buy as a character. He's so intensely suspicious of Sarah-Beth, giving her the death glare for any little thing she says or does, that's hard to believe they ever friends/partners in the first place. Weirdly, as antagonistic as he is toward Sarah-Beth when they're together, he's extremely defensive of her to others.
Anyway, looking forward to S2. Now that a lot of the groundwork has been set, the show should be able to hit the ground running when it starts up again.
