They are very new and still in Bêta phase, there are some quirks (and that is why I did not made yet an Official Announcement via Riecoin Channels), but I can definitively vouch for their Staff. I think that they have a lot of potential and that it was worth getting Riecoin listed there.
Notably, finally an Exchange that does not frown upon Miner Deposits, they even encourage Miners, and do not have a formal Minimum Deposit apparently (of course be reasonable and do not send Dust), much better than NonKyc for smaller Traders and Miners.
I invite everyone to try NestEx for Riecoin Trading and set up some Liquidity Pools!
Of course, as for all CEXs, only deposit amounts that you can afford to lose.
Though it seems that they have plans to actually Insure Deposits, that would sure bring some peace of mind!
Thanks bro! Kojagiri here we've been chatting on discord already rite

So in terms of deposit insurance, we are only able to cover USDT at this time. In future I think we may be able to cover USDC and other stablecoins; but I don't expect coverage for traded coins so ideally (my recommendation to everyone): If you do not _need_ your coins on the exchange for trading or LP, try to withdraw to your own core wallet. Come back and trade; then withdraw the excess.
We want our users to be safe. IF they are safe they will come back, and we will survive longer thanks to that goodwill.