Hoya bordenii is an okay Hoya, but the flowers were too similar to two other Philippine Hoyas that would make better choices if one wasn’t trying to collect all the Hoyas in the world.  Both Hoya sp. Mindanao UT-247, and Hoya ilagiorum are quicker, and more rampant bloomers with flowers that are very close to Hoya bordenii.  Below a close-up of the flowers: