A:AnswerYes, there are instructions on the package itself when you buy the MagSafe pop socket, it works the same as pressing down and twisting like other new pop sockets can do now.
A:AnswerYes, you can and must remove it to use a charging pad. I would recommend a magsafe charging pad that will hold your phone in place or one that secures your phone.
A:AnswerYes, it will be strong enough as long as you have a MagSafe case or no case at all. MagSafe friendly cases make the connection much stronger, but they are not needed.