It's not like BCT. There are no drill sergeants around yelling at you and you treated more like cadets/soldiers than children. It is fast paced, but you will have times where you are sitting around. First couple days are paperwork and medical days. You'll get checked out again and do flight physicals if you need one. You'll also take an APFT the within about 4 days of arrival.
After you get done with the paperwork garbage, you'll start getting evaluations and doing the field work. You'll do BRM, gas chamber, Audie Murphy Assault Course, CWST, Recondo, Land Nav, etc. You'll also do squad STX lanes and Patrolling.
All in all, it's not a bad time. There are times you'll be bored, but most of your time will be spent doing Oporders, training, etc. Don't expect a pass except maybe a local area pass to the PX.
Are you going next summer?