McDonald's has the worst kiosks of the three that I have experienced (the other two being Taco Bell and Burger King.)

They feel slightly laggy, while cramming in as many upsell interstitials (and "log in with your ~~personal data accumulation~~ rewards account" nags) as possible. This makes ordering feel like wading through molasses. The other two could also be slightly streamlined, but the number of clicks to order doesn't feel as egregious. (I'm now tempted to go count and see if my perceptions are accurate...)