This is accurate. I've been flashing phones with custom ROMs for years now, and doing it through the browser makes it both dead easy and pretty safe. You no longer need to be a tech shaman to do it. Just follow the instructions and you're good.

Also, if you don't like it, you can always go back to stock Android (i.e. what was installed before you started tinkering). It's pretty painless. So roll up your sleeves and explore!