It really gets the mix incredibly well between editorial ideas (i.e. "Among the trees" with lots of very different adventures in the forest), machine learning aided curation (including cutting videos to cue scenes!) and overall format: Fitting, vibrant but non-annoying music in the background, the format isn't too short or too long. Plus, at the end you can choose between more pre-curated moments.
The privacy-preserving curation that just takes some background cycles on my mobile GPU while it's charging is the cherry on the cake and I think Apple really got a bullseye there.