Ok to be fair here it always has to be taken into account what is at risk. Don't store a lot of funds in an online wallet, but you also secure mytherwallet quite well. If you need a wallet for regular transactions it is not that bad.
Aside from that.
Be also watchful to the gas fee of ethereum with the use of those websites that monitors it like ethgasstation.
I can only give a positive report about mytherwallt when it comes to gas fees and the adjustment is very easy. But the price range of the fee is in accordance with what is show on the respective websites like gasstation.
Yup.
And whatever the fees still depending on the person that will send it and he's the one to adjust it. If he likes to pay with the recommended fee then he has to pay it without hesitation.
But if he's hesitating and he seems to find it unfair and quite high, there's always the adjustment that he can do freely.