I am using it and I feel that my coins or tokens are safe and secured in that wallet,
You just have to be careful in clicking some sites there are some phishing sites that could look like MEW.
I know some people who lost their money because they open their account in some phishing sites they thought it was the MEW original website.
As per where i have been start for i am trully believe on it and also this is where i store my tokens for a long time as long as i store in a safe place my key of my mew.