As an immigrant myself I could answer it in many ways, but I dont know exactly what you want to know... cons is you´re far away from your family, your language, everything you know and it get very lonely sometimes, and pros are you get a chance to start a whole new life the way you want it, a whole new world opens to you, it´s great freedom and learning!

I think this big move in people life, and need special characterisitics especially risk taking, but new life worth more!