My interview there was verly low-stress and I was accepted. I don't know if that is the norm, or if I just got lucky. I also interviewed in March, so a late interview doesn't kill you at SLU. But, things to know:
For me, it was open file. Be aware and ready to discuss any "red flags" or problems with your application. I had a few low grades and even an MCAT section that was low. This was actually the first 5 minutes of my interview (only roughly ~30 min total). So this could have been morally defeating if I wasn't prepared. I looked at your profile. 10's on the MCAT are right near their average, so you're in great shape. You might be asked about GPA issues, because that is below their stats. After the "red flags" be prepared to talk about why you want to go to their school. SLU is jesuit, and thus, big on community service. It's also located in the ghetto, fyi. As a school they are known for clinical experience, though their research is ranked somewhere at the end of USNEWS and improving (not a reason to go there though). Do some research on their website and find things you like. You might want to just read this entire thread, it's got some good stuff that helped me. Finally, like in any interview, sell yourself. Talk positively about your experiences and come off like a nice and normal person.
Good luck!