I have no experience with that particular rehab, but any rehab only works if the person attending truly wants to quit. Are you doing this research for your son?
thats the problem, i am not sure he truely wants to be sober, very frustrating
It certainly can be frustrating. And unfortunatley, there is really nothing you can do until he decides that he wants to get better on his own, as much as you'd like to. Even the best and most expensive rehab in the world cannot change a person's will, so many who enter not really wanting the help end up using again literally the day they get out.
There is a sub forum here you might also find helpful for family and friends of those with alcohol/addiction issues. Best of luck and best wishes for your son to see the light and seek help.