Not sure what make my swivel is, the bracket is Vankraft. In use, when facing forward, the 12 degree angle forces the back and neck into positions that do lead to discomfort. Your eye line is at the bottom of the visor when down, not good for a passenger who likes to be road alert or suffers travel sickness, but good for snoozing. This may be our experience because of our age or the particular swivel we have.
In use, when swivelled around, we have found that keeping the seat folded is more useful. Neither of us mind just plonking our butts on the bench without the back upright. Again the angle of the back rest when up and facing into the van we find un-natural.
We have noticed damage to the seat back cover caused by the teeth the are exposed and catch the fabric as the seat is folded. Pulling on the fabric as we collapse and erect the back has stopped the damage worsening.
Folding the bench flat is essential for us, the upright back of the factory bench is poor. The Vankraft solution for us isn't right but is the lesser of evils.