I'm about to break in my last V-Spec before the new ones are released in the USA. My opinion the V-Spec is one of the best all around motors. You get TONS of power, steady tune, long run times, reliability, geez I could go on forever. I love my speeds too but those are for special occasions, seeing how that kind of power and price isn't needed for small fun club races most races.
The best OS motor I have ever ran is the JP Modified OS V-Spec, I won't start...
I honestly think some people have problems because they don't break them in properly and one the THIRD tank start beating on them, or run the bottom to lean, or can't tune a motor in general very well and blame the motor.
Andy