I was kinda addicted to the first part. So I was really excited about the sequel. I tried to do everything in one walkthrough and only missed two. That took me for about 12 hours. I did second runthrough, in which I ignored everything except the main missions, in about 3-4 hours.
I was suprised, it took so short and it was my first (and only) 1k! So I was happy and sad at the same time, lol