Cyberduck is a very user friendly SFTP/FTP client that focuses a lot on big icons, drag and drop and nice status icons. You can save multiple hosts, so you can easily change between your servers.
It feels a little newer and nicer than Filezilla, but both have their advantagers over the other. If you don’t need your FTP client to be available on Linux, this could be a very viable choice for you.
I’ve been using it in my Mac Book Pro days, but have not had a go at it since. It worked quite nicely though, so I think you should give it a shot if you’re looking for an FTP or even SFTP client.