I've tried installing the CA in one of the middle row captains chairs in my Honda Odyssey using LATCH, and I cannot for the life of me get it tight enough. I'm a pretty strong person (built lots of upper body strength from lugging around my 35 pound son), but no matter how hard I tug on the LATCH belt, it's not enough for a solid install. The seat still moves several inches side to side.
Now, I'm certainly no car seat expert, but I have installed my fair share of car seats in my six years as a parent, but I cannot figure this one out. The seats I've installed in the past have alway had a latch belt on each side though making it really easy to tighten. This is the first seat I've used that has a belt that goes across the seat and can only be tightened on one side. Is there some trick to this or what? Or do I just need to use the seat belt?