I bought my WRX from NSW less than two months ago and used CEVA logistics (I think it's the same as CEMA that GX-REX used). Very easy to deal with and I was really happy with the service overall. My car did receive a small scratch in transport but it's very minor and they are happy to cover it under their insurance. Only problem I'm having is finding a panel/paint shop that will do it under their (CEVA's) cover. If anyone knows of a good shop that will do it let me know as I've got to get a quote and haven't found anywhere that's prepared to do it so far.
But back on topic I found them very good and would definitelty use them next time I transport a car. I've heard of some horror stories and serious damage to vehicles using some other companies.