Running an H&R 26mm. It came with zero maintenance bushings and for the most part it has been absolutely quiet. Install was easy and I had it done by myself with hand tools in about an hour.
As far as driving, it was a mistake to buy it without having dampers that could handle the increased spring rate from the bar. Adding just the bar alone made the car noticeably unbalanced in the rear. Driving the car at an autocross with just the rear bar simply resulted in a disconnected handling front to back. The front felt vague and the back felt sharp. Not a good feel.
After I purchased the coil overs the bar was better controlled and the front and rear suspension responds in sync now. There is enough flex in the chassis and the coil overs have tender springs which provide 3 inches of wiggle room when I need to scale uneven driveways. I have yet to do an autocross on the suspension and am going to get aligned and corner balanced this weekend.
Overall I must say that swapping the bar out and expecting a massive change is going to be more to do with cognitive dissonance than real improvement. It was the combination of the coils, LCA bushings, deadset kit, and rsb that changed things.