It is difficult to talk about the reputation of the exchange as this is a subjective opinion. Someone they may not like and someone with pleasure trades on them.
Maybe I would like to trade on these exchanges. But it is unlikely that I will, knowing the reputation of these exchanges.
Sometimes you do not have choice. For example, many tokens is possible to sell only on Yobit. It is good that there is a choice of the exchanges in the case of EDC blockhain.
For me the most important thing is that there are a good trading volumes for EDC tokens. It mean that tokes are in demand.
According coinsmarketcap the biggest trading volumes of EDC comes from YoBit. It is the most popular exchange for EDC tokens.
There are a lot of new coins on this exchange. It is because of this that negative reviews appear, but I personally like it.