I Use Buzz tools as a secondary tool. I love it as well. I can convert whole folders full of folders full of designs in one click to a different format when necessary. I can see the designs as well, and when my primary program (4D by Viking) says a pattern is corrupt, 9 times out of 10 Buzz can read it and convert it. Pays to have a backup, even a free program, because all of them have little glitches. I love 4D organizer (like Embird iconizer) for viewing, cut, copy, paste, deleting individual designs, duplicates, etc. I also do alot of editing in Stitch Editor and other parts of 4D. Haven't done any editing with Buzz but I know you can. Buzz and Embird don't require a dongle, and that is awesome. If I hadn't gotten 4D with purchase of my Viking machine, I probably wouldn't have considered buying it because it is $$$, but it is a great program. I have no complaints, but I haven't ever lost the dongle, either!