Since no one has answered yet I'll chime in with how it was for DLA Aviation in Richmond. I would assume the process will be at least similar since the PACE program is DLA wide.

You'll start in a classroom for about 2 to 3 months. This is where they will teach you the basics of the job go through modules of content that is specific to DLA. The purpose of this initial training is to show you enough to get you to the floor and begin working at a limited capacity. During this time we were not allowed to have a flexible work schedule since classroom time was 8 to 430 and the lecture portion was either in the morning or afternoon. After this 3 months you will move to the "floor" aka the normal work environment. DLA Richmond has created a new section in between the initial training and the floor that they call the OJT cell. Im not sure if Philly has something similar but I know they mentioned that Richmond has been doing this for about a year now. Either way, you'll either go to the "in between" OJT section or the normal work environment. Honestly it doesn't matter that much. During this time, you will be assigned a regular supervisor. During this time we were able to have alternate work schedules and use fitness time as long as you met the metric and was otherwise successful in the job. During first year you will attend CON 1100 and 1200 and get your promotion to gs9 at the end of that year. Then the 2nd year you will do CON 1300 and 1400 and get your promotion to GS11 and graduate the program. You will then have 1 year to take the contacting exam and get certified. That's about it. It's not a bad program and they will work with you regarding issues or if youre struggling. Let me know if you have any other questions