I installed the bar yesterday. My impressions are that the difference is subtle but noticeable particularly at the limit. But even at less than irresponsible speeds, the front end feels "lighter" and easier to point in any direction i please. Near the limits when the tires start to protest my cornering speeds, it feels like i can push the car a little harder before the xds kicks in and you get the artificial rotation in the car.
All in all i'm happy as the improvement in rotation and handling is noticeable but without ruining the cars high speed balance. There's definitely more room to push it's handling balance even further. At the limit, without the electronic assists, i feel like the car would still understeer but less so the previously. Therefore, it's a good setup for a daily driven street car. If it were more of a dedicated autox car, i'd probably want the thicker RSB instead.
Those are my impressions. Next on the list of mods, some new lighter wheels with summer tires (probably in time for next summer), and a wavetrac LSD (longterm, maybe around 40k miles when i change the DSG fluid).
Thanks for reading.