The product is way more popular with zeds that have steptronic. I have a 6 speed and find no problem with it. The special feature I like the most is that it evens me out when on a longer drive. If you take a long enough straight edge and place it on top of the Mark IV center arm rest and on the door arm rest you will see it is even. Your own geometry will also be even and that helps your comfort enormously. However, not all peeps have the same arm or torso length etc., so only a few find it not quite to their liking. I even had mine made with Alcantara (high end suede). btw, I removed mine when I enrolled in a High Performance Driving Events. There are legions of Mark IV owners that wouldn't trade their armrests for anything. I know because I saw hundreds of them at Homecoming.
powerontap, voice your concern with Andy M. at LeatherZ. I am sure that once you install the product you'll love it for the quality, design and practicality. If you don't, I am sure Andy would accommodate a return within a reasonable timeframe. You can't loose, email him through his website or PM him through this forum (AndyMaddux)