I have tried a few and this one is the winner. The UX is simple and doesn't have any fancy features, although is well organized and has beautiful pictures, extra resources, and a helpful tracker/stats + timer. But what truly matters, the content, is just excellent. The people behind the scripts, structure, and narrative are serious mediators themselves with a profound understanding of the subject. The guided meditations go beyond the feel-good approach of other apps and provide insightful instructions and sufficient explanations. I highly recommend it.