nearly killed a phal in s/h. (of course, it tried to die in sphag, and then in bark. it's in the process of being mounted at the moment.) *did* kill a phal in s/h.
however, got a $10 sharry baby that was trying to shrivel up and die on me, so i finally put it in s/h--w/in 2 weeks it was looking better, and it bloomed last fall and is now putting out another p.bulb. seems happy.
had a phrag that was doing ok in bark, but i figured "what the heck" and put it in s/h a few yrs ago. it grows and blooms and seems happy, but i have no idea if it would have done the same in bark or not.
got a jason fischer (phrag) last summer that i put in s/h; it's still alive, but growing glacially slowly. however, since a JF is half species (i think), it may just be the whole 'species' thing. my other phrag is a complex hybrid. (it's also very chilly on my windowsill at the moment--it may be happier when it warms up.)
if you want to try s/h, put a few plants in a wait a year and see what happens. there's no rush.
