Not particularly. Its probably 10 hours or so? I sorta wrote my last post wrong. I just beat it last night, but I played it over 2 days or so. It was just the last 2-3 hours I got totally hooked and had to see it through.
It's got a really interesting "memory" mechanic. Instead of just having things to click on, you can click and drag things into you Short Term Memory (STM). So theres a computer terminal in the corner of the room, for example, and you want to ask the secretary about it. Its not just going to be one of the options in the dialog tree, but you can ask people about anything you put in your STM. Of course you still get responses like "They probably don't want to talk about that" when you ask some random dude about the houseplant, but its still really cool. The only time it sorta sucks is when you don't put things in your STM and then during a conversation it becomes apparent you should be talking to this person about it...you have to bail out, go put it in the STM, and start again. So its not a perfect system. Unless you go OCD and just add everything you ever see to your STM.