Well MEW or myetherwallet been uses by many users mostly on this forum , and for the bounty hunters like me , it's serve as a storage for the bounties or tokens that i've received. It's very useful and easy to use , and by the way don't forget the private key , it's the most important key of all , and then it's trusted a hundred percent trusted , try to read some comments and review about mew (myetherwallet).