Whether to have commenting or not depends heavily on your specific site/app, there's no generic answer. Depending on how much user interaction you want/anticipa

Whether to have commenting or not depends heavily on your specific site/app, there's no generic answer. Depending on how much user interaction you want/anticipate, you could have like/dislike, rating/stars, or comments. If you would like to have comments, but don't want to waste time on building them, you could use external comment system like Disqus (or even Facebook comments, if it makes sense for your case).