Definitely effective
Although it makes me sit a little too high in my personal vehicle(5’11 in an infinity q50) this thing work pretty good for my work truck(more seat lifting/lowering ability). My legs tend to get sore while driving 120+ miles round trip but with the royal seat cushion i get little to no soreness!<br />Pros:extremely comfortable<br />  Helps relieve pain and helps back alignment<br />  Works great in any type of vehicle<br />Cons: when driving a big truck i dont feel completely stuck on my seat when having to make normal to sharp turns. Almost feels as if my seat needs to have good side support so i wont move as much on turns<br /><br />Moral of this review: maybe purple should link up with a car company to make the vehicle seats out of this
Rating: 4 stars