Andftp is a ftp app used to transfer files from a remote computer to your android device. I find this useful especially when you have a torrent client set up on the same computer. Then you can start a new torrent from the android then download it from the computer once it completes.
Continuing on to the review of the app. Its pretty easy to use once you get it set up. When you start it up you have a box to select which ftp server to connect to. Then once you connect you select what you want to download mark it, then flip to the device view, and select the location to download it to. You can set in the options the default folders for the server and local location. Then when you start the download it brings up a status bar that keeps you from continuing to browse untill its done.
There seem to be a few peoblems I can see resume support doesn't always work. I seem to also have problems downloading files with long folder names. Otherwise I would highly suggest it.