I only played the first one (watched a let's play of the second one) and while I liked some aspects of how the world/story was designed the games themselves were not that great.
I still liked the first one because it was on the Quake 3 engine (I love that engine, it was the platform for some great games, i.e. Jedi Outcast...) but the second one was really not that great because it was too repetitive.
I also had a problem with how they handled the story. At the end of the first game she was like "Yay, I'm cured!" and the second game was basically "lol NOPE".
Now we donce.