This Freewallet app has a lot of security features: 2-factor authentication, email confirmation, PIN code of 4 digits, and even a fingerprint login. That impressed and surprised me most of all. And that's why I can call it a quite safe and secure wallet for Monero. I'm sure that it is not the whole list of security features Freewallet can provide you with.
I had enough time to try all of these safety features. Most of all I liked the fingerprint login and the PIN as they are the fastest to open your wallet.
As for fees, those are quite low too. The only point is that when you want your transactions go faster, you have to overpay a bit. If not, there's a chance to get rid of fees at all: just send coins from one Freewallet to another Freewallet.
The only minor problem is their interface. I don't like it that much and can't call it simple or intuitive enough.
To sum up, I think I like this wallet more than I don't :)