For small files when you're working with someone it's easy. For large files though it's a pain - you have to wait for it to upload from your end, and then for it to down on their end.

This is pretty annoying if they're sitting 10 feet away, and you can get it done faster if you just pull out a USB stick and do it that way.

There really needs to be a solid way to share P2P with someone on the same network.