It's a fun, interesting, and an overall grea game.
I really like this game, there are others like it, but this one is seems to be thought out in a better manner it has a good backbone but there are a few flaws that frustrate me at times.
The elevator system -
The system works well at first and is easily manageable, but when you start expanding the customer reviews complaining about them continue consistently. A better approach would have been to give the gamers the power to directly upgrade the elevators instead of giving one that can hold twice the customers. The reason for this is when the elevator is in a line (which is the least challenging) it can only hold ten for up to 49 floors(?)
The staff elevators didn't really seem to make a big difference.
I'd love to stare at this game and watch it develop if it were always interesting but sometimes you need to wait and go to another tab. However, you're not able to do this because the game auto-pauses so if you don't want to stare at your screen out of boredom you'll have to leave your game running while you go somewhere else in the house (on another computer)
Those are the only two problems that I can think of, and they're not that bad, but for being able to get a great reputation on the hotel you'd have to build dozens of elevators and click, and click, and click.
I hope you do end up making a sequel, because it was a really great game!