This is an incredible resource that asks and answers very difficult questions. Not only are the articles extremely well written and thoroughly researched, but the discussion in the comment boxes provides a wealth of information.
From the website:
" We are Catholics, but none of us was born or raised in the Catholic Church. We arrived in the Catholic Church in diverse ways but through a similar path involving spiritual formation within the Reformed tradition of confessional Protestantism. We are grateful for all that we learned about the Christian faith in the Reformed tradition. We are also grateful for the piety that we found within the Reformed congregations to which we belonged, and for the love for truth that is a significant aspect of the Reformed tradition. We do not view ourselves as having left our Reformed faith behind, but rather as having found its fullness in the Catholic Church. "