Very easy to send coins between different blockchains with very little fees, fast support, easy to trade, no limits on trading pairs, all coins are traded against all other coins. I also liked XBTS DeFi (LTC, DOGE, DASH, RDD, STH, EOS, HIVE, BTS) i have not seen similar pairs in other DeFi. SmartHolder, XBTS pays 50% of the exchange profit twice a month in bitcoin, usdt and many other coins, it was nice See full review