McDonald's (NYSE:MCD) is on the verge making two huge changes that customers will love.

First, it's expanding a trial program that allows diners to personalize their burgers. The "build-your-own-burger" concept has been tested over the past year at one restaurant in California. It will now make its way to between five and 100 locations.

Second, the company is considering an extension of its breakfast hours. The company has contemplated doing so for some time now but is taking the idea more seriously in the wake of, among other things, Taco Bell's entry onto the breakfast scene.

For fans of the Big Mac-maker -- or, should I say, the Egg McMuffin-maker? -- both changes would likely be welcomed with open arms.

In the following video, Motley Fool contributor John Maxfield discusses the reasoning behind the potential changes. Among other things, he shares why the chain hasn't already extended its breakfast hours and why it feels the need to make moves like these now.