The show has a couple decent enough characters to keep me invested and it's different enough to keep me watching but it's got a lot of grating qualities too.
The show's set up, as a breakfast club of sorts, is problematic for the TV show format as hospitals are very temporary places. In fact, I'll go far enough on a limb to say, that this is the worst idea for a TV show when a movie would be so much better with this premise.
In the pilot, Leo gives a speech to the group about how they're all united by their illnesses (and obviously being in the hospital on the same date) and must wear red bands in solidarity. So as a result, we're actively rooting for people to stay sick and hospital bills to go through the roof. This is probably a health care reform opponent's nightmare scenario: That as soon as we start being generous with free health care, kids will start living in the hospital.
The band leader of the group is the soft, sensitive Leo, who is as close to the manic pixie dream guy I've ever seen. It seems like everyone from Emma (a broadly drawn stereotype of an arty kid with her trademark fedora), to Dash who man-crushes on him pretty heavily, to the nurses, is inexplicably drawn to him.
The show also heightens the romance angle a little too much and it's moderately disappointing that their choosing to make romances happen with the adults. The British quack doctor is naturally attracted to the only other black woman on the show as if it's simply not OK to have unattached characters. Likewise, the handsome doctor claims to be bad with women even though but has bedded every character he's set his eyes on.
For some reason, the show (because of the novelty factor and a few strong performances) is still watchable and there might be a range of opinions on how people respond to these characters.