I think K-L-N and Hormex liquids are probably the best ones for orchid use. They both contain IBA, NAA, and B1, while other brands tend to have only one or two of those, often in much lower concentrations.
Whatever you get, try to get it as fresh as possible, and keep it refrigerated, as the synthetic hormones degrade rapidly if exposed to heat and light.
I think one reason folks give them a bad rap is because they have old, basically ineffective stuff.