I've had both set ups. Currently on Super Downs. Downs give a nice drop, rides and feels just like stock but a little better in handling. Now with Super Downs, the car is way lower. The ride is stiffer, but not unbearable, maybe to elders like my parents. If you want to keep the stock comfort, go with Downs. With Super Downs, it drastically changes.
14' IS250 AWD F-Sport | Obsidian/Black | NAV | BSM
K&N | LED | 35% 3M Color Stable | Grimmspeed | RS*R Super Down