I am using two client of the Bitcoin that has really a good work for us and gave the ease to handle our btc in our wallet .
My first wallet that I used is blockchain.info , I am using blockchain.info because it has all the facilities that I want and I need at most but it needed a better Internet connection , so that I need  to use that wallet which can operate at slow network of internet .
So I am using mysellium wallet also , where I can send and receive Bitcoin with very slow internet speed and also can generate new address easily and also can import and export addresses easily .