If Hoya sigillatis grows well for you and is not the temperamental beast that it is for me, you are very lucky.  With its hard leathery, lovely spotted foliage, it can be quite beautiful.  In a few weeks I’m going to try to transplant this misbehaving little plant and if it looks good at the end of the summer, I will probably decide to keep it around; if not, then I’m afraid that we will be parting ways for good.