Briefcases was great. I would simple copy files from my desk top into a briefcase on my laptop, modifiy the files while at work and then when I got home, simple click "Update All" and it would find what files were changed and update them.
My only complaint was that the more you put in the file, the slower opening the briefcase was to open. I just downloaded SyncToy to try it out but currently, using the SIM card is working out ok. The briefcases work fine as long as I don't use them over the network.
I'm not thinking about dumping the OS simple for this one reason. I've had many issues with networking ever since I upgraded to Win7. Everything else seems ok but I do a lot of networking on my laptop so if it doesn't work the way it did in XP then the whole OS won't work for me.