I used MEW wallet since 2017 and in my opinion MEW wallet is very good for me to save ERC-20 coin that I have, besides that I am also sure MEW wallet is very safe if you can keep the private key properly, because ERC-20 coin that I have are very safe until now, so in my opinion MEW wallet is very good for me to store ERC-20 coin that I have, therefore I chose to use MEW wallet and did not want to change another wallet.