I used them all weekend at the classic and they worked very good. I didn't do as well as I hoped, but that didn't have anything to do with the tires. My main issue was that my motor went out and I tried a different brand and didn't know what to gear it at and setting the timing wrong. (Found out it was set about 20 degrees low! I didn't have the speed I should have and came off just over 100 degrees after the main.)

Here is a picture of the tires next to a pair I haven't used yet. The outsides are the ones I ran vs the middle are just mounted with a little bit of seem removal. As you can see they will round out more after some use.