8O Okay, it's free so I get that part, but why all the excitement about what it does? There are many free and inexpensive programs that have been doing this for years. I'm surprised that everyone is only now discovering how valuable this concept is... and it really
is valuable.
I've used Second Copy (
http://www.centered.com/) since 1999 and it has been totally reliable with both easy set up for simple tasks and all the customization you could ask for if you're looking to do something more complicated. It'll even keep a user-specified number of copies of older files that it deletes for added security in case you want to recover an earlier version of something you altered and then synched into oblivion.
I use it to synchronize between my home and work computers using a tiny 60GB USB HDD. Synching this way has the added benefit of creating an automatic backup system since there are 2-3 current copies of every work file in 2-3 different locations.
I can't tell you that you should pay money for Second Copy instead of using the free one from MS -- only you know what your data is worth -- but I can tell you that, in more than 5 years of use, it has never crashed, lost a file or otherwise misbehaved. These files are my work product, so when it comes to trusting a program to accurately synch the right file and delete only those that are really supposed to be deleted, I'll stick with a program that has a proven track record.