I was a little worried that Day wouldn't be able to break out of her "Codex" role from her other series, The Guild, but she does an admirable job here in the first episode, setting Tallis apart (as a confident and somewhat snarky elf) from her other roles.
The way the Qunari are depicted does bug me a little though. I'm not sure if it's the costume or the acting, but they don't give off the same presence as they have in the game - there's not that sense of intimidation in their first appearance. We'll see if the series can overcome this.
Dragon Age's newest story-based DLC is also out today, which conveniently enough features Tallis as a playable character. Mark of the Assassin can be picked up for $10.00 or its equivalent Bioware/Microsoft Points value on PC, Xbox360, and the PS3.