on track, the bt016's gave out faster than the power 2ct, q2, and corsa III. they lasted the shortest number of track days. even riding at the relatively slow pace i am, the stones started getting squirmy and mushy on corner exit and with throttle-on at lean. although, if they had weird tire pressure requirements, it could've been human error. anyway, it just goes to show that tire preference, just like everything else, is up to usage and just plain whether you like them or had a good experience with them or not.