If you haven't interviewed yet and you're going to interview sure! You'll miss a lot of the less exciting stuff for your interview. If you're just going to check out the company pitch and see what the SLC hangers look like be forewarned that you'll come and hear the exact same pitch on day one of INDOC. I don't regret going for my initial EC because I started my clock as a cadet, and the 6 months of seniority helped out with my sims and starts the clock on 401K, bonuses, and a few other benefits. Just understand that you'll be back to do the same thing again for day 1 of INDOC.