I have read many people that became disillusioned over structured data. Maybe its value was overstated by some, because it is definitely not a SEO ranking miracle. However there is definite value from my experiences. I don't see so much of a ranking boost but I do see a traffic boost many times when I use structured data. My hypothesis is that structured data makes your result looks better so it boosts CTR.
What are your thoughts? Share your insights on the good & bad of structured data.