I can't tell how reputable the exchanging services are, but they aren't many on the list. And you also have the option to either let the system select for you or you pick them manually from those listed.

As for it been easy, yes. But on my first time using the swap function, I literally wasted a few coins as I had to purchase some Tron up to about $10 just to serve as fee because I used the TR20 usdt. You should also know that the swap fee is seperate from the swap rate.. the exchange you are swapping with is going to give you at a rate, while your transaction would use the fee. But I guess you might be aware of that...