The most appreciated exchanges out there seems to be
Binance
OKEx
Huobi
Those are also the highest rated exchanges here at Cryptowisser (a new site that I love and try to promote whenever I get the chance): Cryptowisser - Compare and Review 250+ Cryptocurrency Exchange Sites
The below information is review from Changelly that Cryptowisser explains everything quite well.
General Information
Changelly is a cryptocurrency exchange headquartered in the Czech Republic. The group behind Changelly is MinerGate, which is a team with one of the longest track records on the crypto market.
Changelly is one of the absolutely best exchanges when it comes to finding the best available rates of the different trading pairs on the market.
Changelly does not forbid US-investors from trading on its exchange, but US-investors should as always do their own independent assessment of any problems arising from their residency or citizenship.
Fees
Trading fees
The one thing we can’t stress enough is that you must always ascertain the trading fees at any exchange you are interested in. Every trade occurs between two parties: the maker, whose order exists on the order book prior to the trade, and the taker, who places the order that matches (or “takes”) the maker’s order. Makers make the liquidity in a market. Takers are the ones who remove this liquidity by matching makers’ orders with their own. Most exchanges separate between the fees they charge takers and the fees they charge makers.
EXAMPLE:
Ingvar, offering to buy 1 BTC for USD 10,000. And Jeff, offering to sell 1 BTC for USD 11,000. If Bill comes along, and sells 1 BTC to Ingvar for USD 10,000, he takes away Ingvar’s order from the order book. Bill is here a taker and will be charged the taker fee. What if Bill instead offers to sell 1 BTC for USD 10,500? Well, in that case he places an order on the order book that does not correspond to an existing order. He would thus have been a maker of liquidity. If someone would have accepted to buy 1 BTC from Bill for USD 10,500, then Bill would have been charged the maker fee (usually a bit lower than the taker fee) and the relevant buyer would have been charged the taker fee.
