I remember both the reception station and the BCT at Ft. Jackson. I would definitely do it all over again.
One tip for him that I did not remember/know. It gets COLD in South Carolina at night. When we were on our bivouac, we woke up with ice locking the zippers on the sleeping bags. Tell him now to be prepared for colder weather than he is used to, in addition to everything else. My son also went to Ft. Jackson, but since he left in August, he did not have that problem.
One other piece of advice, but it is for you. If you get a chance, go to his graduation from basic. You will be very proud and amazed at the change in a very short time. I was unable to go to either of my children's graduation ceremonies from basic and I regret that to this day.