I’m not familiar with them, but I would be very suspicious given that they seem like they would twist a lot of interpretations to suit themselves. E.g. Mt 16:16-19 completely misunderstood so that they don’t have to follow Papal Authority. That’s only one example, but you get the point.
One site that I most highly recommend for Bible Study is tallguyav.com/stjicc.html (although they do go far beyond strictly Bible study, they also have classes that are solely on the Bible.)