To everyone that complains about how difficult it is to use composer: It really isn't, and it's nothing to be afraid of.
In this short recording, on a Windows machine, I use composer to download the contents of one of my own packages (CIDRAM) into a newly created directory for a hypothetical new project.
Like all things in life, it isn't without a small learning curve, and I understand that not all composer tutorials and documentation is easily understood at first glance for those without prior experience with composer, but that said, once installed, you can have PHP simple run composer without any commands or arguments in order for it to produce a detailed list of commands, and the "help" command can be used in conjunction with other commands in order to produce argument lists and other detailed information. I'm not exploring every last inch and every last detail of composer with this very short recording, but the point I'm trying to make here is that there's nothing to be afraid of with it. :-)