Actually, I have to agree with nympho, and sheldon to some extent. The Hymenopus has had this definite fixation of being a very hard species to keep, and have been advised against keeping by many people. However, I found them SO easy to keep. I find them no different at all to keep, as something like a Phylocrania, or a Sybilla, which, IMO, are easy species to keep.
Appearance wise, I do think they are over rated. There really is nothing to them, they are white, and slightly pink. They are a wonderufl flower mimic, and the idea of that could be enforced slightly more...However, I personally think species such as the Pseudocreobotra, and even the Parasphendale, as adult, look somewhat more outstanding than the hymenopus.
One species I do feel is under-rated, is the Miomantis. I think these are truely fantastic species! They have such a great character, and have an appetite like a horse. They are not scared to tackle prey larger than themselves either! As adult, they are very tame, and the colour variations between specimens are truely amazing. I just generally think the Miomantis is a really cute species, that more people should be keeping
Cheers,
Ian