I know personally the families of a number of our offensive linemen over the past 8-10 years and everything I heard (either directly from the kids or second hand from a parent) was absolute praise for Foley. I also heard from a former lineman (who played at a reasonably high collegiate level some 35 years ago and coached at a very high HS level for decades) considerable praise on Foley's ability to teach blocking fundamentals.
What Foley does best is not innovative or exciting which likely plays a large role in why there haven't been vultures circling our campus for years trying to pluck him off our staff. He also is far from perfect (as at out best under Foley we've never been much better than adequate in pass blocking but some of that may also be attributed to the level of our skill position players and the level of teaching of said players) but we are very lucky to have him and if I was told going in that we would end up retaining only one of the coaches from the final run of this past season, Foley is absolutely the one I would want.