Agree with mightyaa. Spot on appraisal. I agree with everything you wrote.
I ran them on my e46 in 265/35-18 front and 285/30-18 rear. They wore pretty well. I was surprised with probably 3000 miles on the street and maybe 4 track days. Rears were gone and fronts still had quite a bit of use left.
You really have to be pretty hard-core to run them on the street. They hydroplane like nobody's business and slip/slide all over the place in temperatures below 50 degrees. They are responsive and make the car very darty in day to day driving.