The Mighty RiggingDojo’s Brad Clark provides some info on using the Skeleton Generator in the HumanIK Node in Maya demonstrating some of the drawbacks and shares some solutions for getting a workable rig.
Human IK skeleton generator pitfalls and solutions to using it successfully
Brad notes that this is in response to some of the renewed interest in the skeleton generator and HumanIK centered around the release of Autodesk Maya LT, working around some of its limitations but still getting a usable rig for output.