I have 2012 Choice and I imagine they are quite similar to the 2013.
The tension relief does not do too much at all. Not really something I do as you kinda have to release it before you do anything - I am pretty lazy
Also I am finding with my left binding (I'm goofy) that the buckle is slowing down with its release significantly and I have about 15 days use on it.
The release of the bindings when you pull the high back down makes the smallest difference with any other rear entry binding.
This is all just my experience with it.