I have never really felt that I was able to organize my life as much as I can now that I use Things. Working 40+ hours a week and being a full time student means that my schedule is always busy. I used to put everything on my calendar but that just wasn't working as it made my calendar very cluttered and using that method didn't allow me to have access to any organizational features.
Things has a beautiful and elegant user interface that I enjoy using. Its soft on the eyes and the animations throughout the app actually make you feel good completing your things that you have listed.
I can't recommend this app enough and you won't regret using it.