I like that it is not only an investment platform but also has its own cryptocurrency called Steemi which can be used to pay for ads, posts etc., this makes sense because you are investing in your content so why wouldn't want people paying with their coin? Also if there was more transparency then we could see how much steems were worth at any given time as well what other users had been paid out using our coins! Honestly haven’t heard of many downsides yet from my research however some others have stated they wish all transactions would go through one place instead or multiple places just make things confusing -.- So far nothing really bad about them although maybe having everything centralized might decrease anonymity somewhat (not sure).
If anyone wants something decentralized try @coinomi /@cryptonews first before considering anything else though honestly don;' t think i need another dapp/.