I have both Premiere Pro and Movie Maker that came with my PC. I am learning to use Premiere, but for me it is a steep learning curve. I can knock out a decent movie with Movie Maker, but of course there are features I crave using Premiere. At the school where I teach all of the video editing classes use Premiere and the kids produce fantastic videos.
Bottom line: I really need to learn Premiere, but enjoy Movie Maker!