Finished Killer Queen. Haven't read a VN since last March and needed something a bit short to get going. It's definitely in the longer spectrum of the 2-10 hours length on vndb, probably a good 8 hours. It was a decent VN with some problems that hopefully get fixed in the remake, Secret Game.
Pros
Intriguing mystery setting and environment
The rules in the game can create some interesting situations.
Cons
Execution is poor. Hopefully this gets fixed in Secret Game
Not enough interesting characters
The protag, while having a reason, can get pretty annoying.. especially in chapter 1
I thought Chapter 2 was better than Chapter 1, but to those of you that have read chapter 2, you probably know the main criticism that it's "easy" to solve. But the situations that Chapter 2 presents I thought was better. Chapter 1's main heroine just didn't do it for me and really wasn't that interesting.. it works for the protag's background.. the protag also, IMO, is a lot better in Chapter 2... though again, there's a reason why he acts like a pacifist in Chapter 1.
All in all, it's a decent mystery VN as long as you don't think it's the next 999 or whatever. Just lower your expectations a bit. One of the few characters I was interested in, Reika, has a route in Secret Game, so i'm looking forward to that since it's supposed to be the best route apparently. 6.5/10.