this show is everything but creative. that alone is not enough to call it bad, but when it also lacks realistic or at least believable tension and interesting main characters you can call it bad in my opinion.
the main character has all character treats of a saint - and i mean that in a bad way: she is the caring mother, the heartbroken widow, the funny and loyal friend, the tough but also caring (again) chief nurse who bends and breaks the rules when it is called for, but only then. she is also nearly always right, makes no mistakes and stands up against the arrogant doctors. all way to perfect to be interesting and really likable.
the story lines also seem to be written only to show her holiness in the right light. even if she makes a mistake, it all turns out OK, everyone forgives her when she apologizes at once and all is well again. that leaves pretty little room for serious character development too, unless you want to destroy this picture of a model citizen.
the only good thing i can say about this show, is that some side characters are made of better material. but even most of them are textbook stereotypes and even solid acting can save little when there is nothing to save to begin with.