I'm a windowsill grower and I have a henryanum. It's blooming sized, but so far it hasn't flowered (it's a single growth plant however, so I'm hoping it'll grow some more before flowering). It's slow, but all Paphs are, so nothing new there. I think I might have kept this one and its friends a bit too dark. They have more light now, so maybe they'll decide to flower for me.