We have tried and used many different FTP Clients over the years but lately we have one that we feel is just right!

FileZilla Client is a fast and reliable cross-platform FTP, FTPS and SFTP client with lots of useful features and an intuitive graphical user interface.

Features, Among others, the features of FileZilla include the following:

• Easy to use
• Supports FTP, FTP over SSL/TLS (FTPS) and SSH File Transfer Protocol (SFTP)
• Cross-platform. Runs on Windows, Linux, *BSD, Mac OS X and more
• IPv6 support
• Available in many languages
• Supports resume and transfer of large files >4GB
• Powerful Site Manager and transfer queue
• Bookmarks
• Drag & drop support
• Configurable transfer speed limits
• Filename filters
• Network configuration wizard
• Remote file editing
• Keep-alive
• HTTP/1.1, SOCKS5 and FTP-Proxy support
• Logging to file

As FTP Clients go this one is very easy to set up and use and it even checks and keeps itself updated.  The price can’t be beat either.

Get it for FREE here http://filezilla-project.org/download.php?type=client

They also have a Server version that is also free if you need something like that.