With most of these guys, it really just depends on how much time they have for you, and if they are just throwing out basic copy routines because they have so many people they are working with. I'm not sure with Justin these days in that regard.....BUT, if he is only taking limited customers, then i'd definitely recommend him. If he is not giving copy diets/plans, he will tailor your plan based off your goals and current needs. I know guys that worked with him in the past, and they all liked him....this was 10+ years ago though.
I know guys he recommended a lot of insulin with (powerlifter type guys), and others he recommended very little drugs with....probably based off what they were using prior to contacting him. He helped a guy I know on the forums who took second to Phil Heath back at the Jr. Nats....he was on very little. He used to be big into carb-cycling depending if you were on a training day or not....not sure how he goes about it these days, but if he is not busy, like I mentioned above, he should structure it based off your current experience, needs, status, and goals. He is very experienced with all the training plans out there, so you should be in good hands, just be honest with what your goals are.