rsync

Sync remote to local

$ rsync --progress [username]@[hostname]:[path]/[file(s)] [local path]

Note: --progress or -P show progress bar

Resume partial download

If a transfer failed using scp, you can resume using rsync

rsync --partial --progress --rsh=ssh [username]@[hostname]:[path][/file(s)] [local path] 

Note: using zsh you might need to use " around the path specifiers (due to globbing)