I tried the same exchange direction. I choose it because eXch notifies in their FAQ about possible delays in Monero delivery which is due to the impossibility of sending a next transaction in Monero before the previous one is fully confirmed. I would like to check how long could the delay last. But, as I understood, there was no queue at the moment of my exchange, and it was processed very fast. Once eXch received my litecoins, it sent monero to me.

In general, I can say that the exchanger looks safe, the fees are reasonable, the reported volumes are impressive. I see only two vulnerabilities:
1. the reserves of some tokens are quite small (yesterday I checked three tmes, and eXch always had only some Dollars in USDT);
2. more popular crypto assets are absent while less popular ones are available (e.g. there is no USDT TRC20, but eXch still supports USDT ERC20 which isn’t so widespread, IMHO).