The ability to see what has changed with one click, easily compare two folders at once for changes or deletions of files, very user friendly! I wish there was an option to have it run in background so that my computer runs faster because it's not constantly running like other programs out there which takes up resources from your system while you're doing something else. There are times when it can be slow as well but this happens rarely. We use merge frequently for comparing different versions between our employees' computers. Sometimes we'll need to do multiple merges within minutes instead of hours just to make sure everything looks right before sending off work orders. This program works great and saves us time during busy periods. It also lets me know if anything important gets deleted/modified without needing to check each individual item myself.