If you mean MEW (My Ether Wallet), it is a very good and secure wallet and gives you your private key which you must keep well in a safe place, meaning only you have access to your crypto assets.
MEW is the first wallet I used at the beginning of my work in Crypto, but now I use MetaMask, which is a very secure wallet and I have not suffered from any problems so far. You must be careful and do not give your private key to anyone. You must also be careful of phishing sites and only connect your wallet to Trusted websites.