It is minimalistic and that's great! You say it is P2P, so would I end up paying for someone else's traffic like torrents ? I didn't see anything in the settings though.
I guess it's peer-to-peer, not peers-to-peers, that means you can send/get files to/from one endpoint, not from multiple endpoints. It is kind of a private file-sharing tool, not a public one such as bittorrent. Just guess, it would be better confirmed by the OP.