There is always a tradeoff when you change to non OEM brakepads. It all comes down to the coefficient of friction. In other words, if the the pads are made of harder material, then you'll have to apply extra pressure to stop the car, but they'll last longer then OEM pads. On the other hand, if they're soft pads, then the car will stop with less pressure, but they won't last as long. So, that's why I always use OEM pads for replacement.....they give the best balance between brake pressure application and wear. This holds true on ALL cars, not just Lexuses. ;)