I don't have pics, but I can tell you from experience that I wasn't crazy as the Apex as a booster. While it's not an AOE, I found the fit to be just marginal/acceptable on my stocky 8yo (52", ~90lbs.) Any of the smaller kids, I would harness in the seat over using it as a booster, even if they were in booster mode. It wasn't awful, and I've seen worse, but I prefer the fits my gang has had in the Monterey, Turbo or even the Pronto or Ambassador.
It's just sooo wide, by the time that belt wraps around both sides of the seat, it doesn't sit right. Plus, it's confusing because it goes behind the armrests, not under them. I really wasn't crazy about it, and got rid of mine because of it.