our local track just ran a 24 hour enduro, novak, tekin and hacker brushless motors were used, none failed. there was one tekin, one hacker, and serveral novaks, the couple of cars that didn't run brushless, some switched to the novaks, (thanks novak for the support) the tekin was/is senorless. none of the drivers (eight per team) reported a lag or anything like that with the tekin.
personally i use the lrp comp speedo with a novak brushless, size does matter, the gtb just takes up to much room in my yok bx.