The problem with RHS is that the slightest misspelling will fail to find anything. Entering Dreams rather than Dream will get a failure.
Also many parts of a name can not be entered on RHS ' "" / and others are all restricted characters in a computer data base.
You have to have a decent knowledge of the database to use it. It fails for me more times then it works so I stopped using it.
Doubly bad since they have changed so many family names. At least OrchidWiz will display the plant and the new name when you enter the old name or when you do not enter a family name at all.
I don't recommend spending the money for OrchidWiz unless you have a specific need for it, but I would never consider RHS free with all the time wasted trying to use it.