The ecutek boost control has one major advantage, the built in failsafe's. Since the ecu is monitoring and controlling it directly if anything goes out of parameters the failsafe's can help save the motor.
As for boost response, I never had any issues with both stock GTR turbos, FP greens or GTX2871r's. Granted those were all fairly small.
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2010 Sport - LS3 swap loading
2012 Frontier - BTWTuning VK56DE swap
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