Naoki, They aren't as fast to produce roots as vandas and they don't produce as many roots in my opinion. Another thought of mine is that with color varieties such as the peach they aren't quite as resilient as say the red. Mine are in cattleya light, less than vandas. These are one of the few plants that I allow to stay in a wooden basket and the reason being is for the extra little bit of humidity the basket makes. I add chunks of tree fern fiber(a few large chunks). I soak the baskets a couple of times a week. I think they require more work than vandas. Some of the aerides I treat the same for the same reasons.