We’ve been using The Mergician as part of a large de-duplication effort on a database of ~100K records, and have been very pleased with it. It has convenient and well thought out options that most organizations could use, and allows you to use your own custom merge files for those cases when the built-in options aren’t enough. In our case, the ability to use custom merge files was critical since we did our own filtering and matching of records outside of Raisers Edge.