After a few days of driving the 1M around with the ESS tune the car just completely rips! The low end torque is always there when you want it and you don't always have to downshift to be pegged into your seat! I had a couple of friends drive it and they were in complete awe! They think it will take down N/A M3's all day long now!
I am very pleased with the linear power delivery now. The car now pulls all the way to redline without what felt like a plateau from the stock setup as it approached redline. The "M" button functions as normal with improved throttle response, but be careful as it is completely addictive now with the added power!
Dyno's will come later this week, so I'll post some updates then!