I was recently expanding my knowledge of methodology of the 3x3 and tried the petrus method. The block building is easy and fast, and the edge orientation is not hard. The way Lars Petrus teaches the last layer on his website seems very inefficient even with the “advanced” section. After completing EO and F2L it sets up a ZBLL every time. It would compress a lot of moves and potentially be very fast with practice. Color neutrality is easy to take advantage of as well.