This is pretty cool (aside from CompoundNoun thing). You can link directly to material cited in the article you are reading. And you can link to material which cites the article you are reading - assuming that the cited or citing material is also in Hein. So pretty much a BriefCase/CiteCase approach to Hein's journal literature. And if you search the Hein Law Journal Library for articles by, well, anyone really, you can see at a glance how often their articles have been cited - potential here for PBRF.
More info about ScholarCheck here including a link to a webinar. Shame about the language but there we are.