This reminds me that the last time Netflix was good (actually, excellent) at suggesting to me was when they used 5-star ratings. When the replaced the UI (still

This reminds me that the last time Netflix was good (actually, excellent) at suggesting to me was when they used 5-star ratings. When the replaced the UI (still 5-stars behind the scenes) with simple thumbs-up/thumbs-down it started giving me mediocre suggestions, then gradually became mostly terrible at suggesting. You could still see your old ratings on the DVD/Blu-ray side, and even still mark "not interested" there. I used to love seeing the predicted rating, and how often it was right or nearly right. I seem to recall reading that the algorithm that won the prize 'proved' that up/down ratings were as predictive as the 5-star system? My results disagree. At least they eventually added a two-thumbs-up option. Slightly better than binary. I resort to thumbs-down on stuff I don't want to see (sometimes even though I haven't watched it).