Is this a good karate class/dojo?

I want to go learn traditional karate and train myself to be fit and good at striking and self-defence. Im a bit shy but this should also help me overcome that. I was thinking of going to this dojo as its nearby - http://www.goju.com.au/ - im not experienced with this sort of stuff but on the website it has the teachers and description of what they teach and stuff... i would appreciate it if someone smarter then me in the field of martial arts could tell me if this class seems like a good legit class not one of those cheap crappy ones i have heard about?