Are people confused by the front and rear entrances? Its hard to distinguish the two because of the many exits they have as well.

I would agree that it can be confusing which entrance is which, but for me, its a big hospital and, unless you work at one, big hospitals are always a bit confusing.

Where is the entrance

Yep I was at first it's strange for sure. Of course I'll never go back after my last experience a few days ago. And if you value your health you wouldn't either. :)