This play is tremendously fun, one of the most enjoyable of Shakespeare's plays, (and one of the easiest to read for a modern reader) but like most of his romances, it demonstrates a roughly sixth-grade understanding of romantic love. At least in a comedy, there's some excuse for this, and it's a tradition that certainly hasn't changed in over 400 years (see: "Shallow Hal", for example) but in general, the characters in this play have about the depth and plausibility of, say, the Three Stooges.
Read this play if you're in the mood for lighthearted Shakespearean fluff, but not if you want something with some real meaning to it. This was, in Shakespeare's time, the equivalent of "Three's Company" or "Dharma & Greg". Light entertainment for the masses, not serious literature.