I have attempted UK, Australia and Canada.

I got thru UK and Canada.

UK was real easy.Just had to take up a short course that was missing from their expectations, to make up for credentialling.And then it was just paper work! (btw, Im educated in India)

Australia (5 yrs ago!) was tough because they dont have as clear guidelines as Canada for what one can expect from their exams.

Canada was easy mainly because they give you very good guidelines on the exam process.