I only started it after their loot patch went out but I'm really liking it. Can't say I've experienced any of the lag Brad talks about, the shooting for me feels great. I'm playing a Colossus with a massive auto canon (gatling gun) and it's super satisfying to chew up enemies health bars with.
A game I've always though Abby would like was the old Sierra adventure game The Dagger of Amon Ra. You play a female reporter in the 20's trapped in a museum and people start dying. It had some cool mechanics in it for the time, "real time" events happening, chase scenes, actually having to figure out who killed who and why.
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