I have not used their seat covers, but I do have a technique for getting into and out of the car that can prevent most of the wear on that upper driver's side seat bolster.
What I do is take my left hand and grip that part of the bolster. Then I slide my back over the back of my left hand to get into the seat.I do the same thing when I'm getting out.This protects the seat because the back of my left hand is preventing my back from rubbing against that part of the seat.
It's a simple technique, but it works great, I've used this for many years with different cars, and have had almost no wear on that upper driver side seat bolster.