I have found this Hoya to be a very fast grower, but a very difficult bloomer.  In Vermont, it needs at least some sun to bloom.  The flowers are fragrant.  I have kept this plant for at least eight years, and it is not because of the blooms, since I have only had them one time.  I keep it because it is a great quick growing foliage plant with a nice clean look.  It is very care free with no special requirements.  It can tolerate low humidity, and sun or shade.  A good plant for a beginner!