*How long did it take to play the entire game?

Has anyone finished the game yet? I was wondering how long it took to finish the main game with the bonus chapter? Thanks for any help you can offer! Have a great day!

I just finished the bonus chapter. Must admit I skipped some of the puzzles cause I'm not a puzzle person but I d/l the game about 9:30 a.m CST and it's now 7:00 p.m. But I'm one of those people that likes to look at the ERS scenery.

P.S.
I did do two loads of laundry and fixed two quickie meals in the meantime.