In my anecdotal experience, it seems like Netflix's own content gets weighed disproportionately high. This could be a result of the fact that first-party content never gets removed, so it builds up a more complex graph of recommendations, but personally it feels like they're trying way too hard to cram their content down my throat -- to a point of recommending shows that I would never even consider watching, like Jane the Virgin (not exactly my kind of humor). In the end it just feels like they've compromised their own recommendations to push their own product, which makes me mistrust all of their recommendations.