Honestly, it really annoys me how bad their recommendation algorithm is. The model became so over fit for me, it would only show one or two topics. It made the service completely unusable, and its not clear to me that they provide the user any way to counter act that. If they had some kind of content discovery with actual good answers, that would be great. The crazy thing is how much talent works there, who knows maybe their new model/algorithms are profitable for them. But in the long run I doubt it.