Hoya multiflora is a must have Hoya that I have grown for quite a few years now.  I thought that this plant is bullet proof, but that is not quite true.  You can kill it quite easily if you keep it too cold and over water.  This Hoya when grown warm and humid will grow out of control, and is the number one nectar dripper of all time.  I have to cut all the blooms off from time to time just to stop the mess.  It will turn into quite a shrub if not started over periodically.  A great plant that is easy providing you have the warmth, filtered light, and a little humidity.