I took a look at the website and my first instinct is to keep looking elsewhere. But, I would give the benefit of the doubt and go in and talk to them. If they try to make you sign a contract, politely tell them you are just looking.
Watch a class or two, if they are working out hard (especially intermediate/advanced classes) emphasizing etiquette and discipline, then that is a good sign. If the classes are mostly made up of kids playing grab*ss, or if they put the hard sell on you to sign a contract. Leave immediately.
Ask them about there lineage, do a little research on the founders of Goju, and ask them a couple of questions like: who was Chojun Miyagi Sensei's teacher? or how long will it take to get my black belt. If they don't know the first answer and or if the second answer is less than 3 yrs. I would look elsewhere.
I cannot recommend the Okinawan styles enough, but you have to have a good legitimate instructor or you are wasting your time and money.
Regardless of the style these rules apply.. Remember All styles are not equal, all black belts are not equal. "A belt is just a means to keep your pants from falling down" What matters is if the person wearing that rank, has the knowledge and skill, and the ability to pass it on to you.
Good luck!!