First of all I would like to say, that the MS Sync Framework seems very promising and SyncToy is a very useful demo for the framework. The tool is exactly what I looked for:
I have two small questions / suggestions:
1. Why is name of the move action "Rename"? I think it would be clearer if it is named "Move". 2. It would be nice if the progress bar in the Preview and Run task would show the total completion percentage and the elapsed and remaining time. Some other nice features for the preview window: 3. Group the actions by folder names. 4. Context menu entry to delete selected file / folder. 5. Context menu entry to swap the copy (action) direction -> "left to right", "right to left".