For what it is worth, I have found that in general, epiphytes are more forgiving of the bare-rooting process than the more terrestrial types (for instance, Sobralias hate it and these have a fairly low rate of revival though I have had a couple of successes that were well worth it) Of the epiphytes, those with pseudobulbs and/or tough or succulent leaves (not surprisingly) survive better than the small, thin leaved species.
Now, I have bought plenty of these (because they are so neat and unusual and I am a sucker for both...) and have had enough success to come back for more. However, you very likely will find that your success rate is a lot higher with established plants such as you will get from Andy's Orchids (he has already taken them through the transition and composted the ones that were beyond saving), so even if they cost more it may well still be more cost-effective, especially early in your orchid-growing career. (I have no financial interest in either Ecuagenera or Andy's Orchids other than having spent lots of money at both

)