I use the armrest in a vehicle with automatic transmission. The installation went quick and easy. 4 screws in the center console and who has a cordless drill, which does not need pre-drilling times. The armrest sits stable and matches the rest of the interior. The height is also ideal for my size (1.76).
But I can imagine that someone is small and has to use a manual transmission, so that may have problems to me. The criticism I can confirm that it interferes with folded also, but I have to ask myself, why? I am, I also think that one does not have to fold anyway.