The previous home button was old, hard to press, and nearly impossible to double-tap. I also though a white button on a black iPhone would look pretty awesome.
The repair wasn't hard, just took a while. Unfortunately when I put it back together though, the screen was on a slight angle and I have a thin tapered line at the top of the screen as a result (seen in the image).
Yeah, video record what you do so you can play it back if you're unsure about clips, screws, etc. Also be careful that you don't move the LCD panel attached to the front glass and end up with the result I did!