EDIT: I have had to change my review to not recommended, because when I did get the "win" ending, it didn't let me continue to play through- even though it implies you can. I tried to do a couple fixes (eg leaving the game and coming back, verifying the files) to no avail. You get this quest, and the whole game just ends. You cannot continue to play the hotel and increase your rep and open more rooms etc. Very disappointing. I will happily change my review if the developers fix the issues within the game.

So, lets start with, I am 25hours into playing this game as of writing this.
Is this game buggy? Yes.
Are there a hilarious amount of rats to catch? Yes (although they reset every time you log back in, so if they get totally out of control, you can just log out and log back in- rat issue fix for a while)
Is there a notable difference on the difficulty levels? Yes, and the rewards correlate to the difficulty (on easy mode I only got 1 decoration, on Medium I tend to get 2 or 3 on hard I was getting them almost every quest, give or take. The higher the difficulty level, the more rare the quest rewards are)
You can speed up time between activities and to the next day, and most work arounds for the bugs are easy as speeding up time, or verifying the files of the game.

I really hope the developer doesn't give up on this game, it is a great management/city builder/decorator game, where you dont just lose, you get killed or end up homeless.