Gameplay-wise she never got into my way and that's exactly what I like, just let me play my game.
Character-wise she's quite solid; good personality, likeable, not your average bimbo but a proper female character for once, not some two-dimensional "tits on a stick" kinda girl.
Souplex said:
She is the worst sidekick in gaming history. She's annoying, and fairly useless gameplay wise.
Nope, she's not, simply because she doesn't die and or make you rescue her every 2 seconds. Unlike, apparently, Sheva from RE5. Alyx might not offer much, but she doesn't interrupt you either.
Plus her aim is quite good.