The key things that make this show enjoyable:
1. Good pace -- things actually happen in every episode! And they make sense!
2. Sweet, sweet story -- not saccharine, but uplifting and leaves a smile on one's face.
3. Excellent cast -- in every part, the actors do a really good job.
There are very few, and relatively minor, downsides. For me, primarily, one of the B-plots was a little too convoluted for the remainder of the plot, but still enjoyable. The other one that made the first few episodes hard to swallow was the impossibly-young-CEO trope (though with a woman, for a change).
However -- overall -- a show that is perfect for lazy weekend viewing.