Apex Launcher on AT&T One X(new to android)

Hi guys.

Ive pretty much decided to leave apple and get a One X or Galaxy S III. Im leaning towards the One X but dont really like Sense from what Ive used of it in stores. Ive read about the Apex launcher and I really love stock android but dont really know how launchers work coming from iOS for the past 3-4 years. Does it work well with the ONE X? You just install it like a app correct?

Thanks for your help.