Just for the record. I saw this posted a year ago and the subject hasn't died so... I have used Wilro for transfers every year for the last twelve years (Jo'burg int - Sun City and return) and I have found them to be punctual, friendly and helpful at all times.. I will be booking them again this year and am happy to recommend them to others. (which I have done other the years).
The only negative is they are a bit expensive, but aren't they all?