The master limited partnership has produced a prodigious total return this year. Energy Transfer (ET -0.43%) has rallied nearly 20% this year. Add in the master limited partnership's (MLP) high-yielding distribution, and the total return is up to 25%. That has outperformed the S&P 500's total return of more than 20%. While the MLP might not be as cheap as it was to begin the year, it should still have plenty of fuel to grow value for its unitholders in the future. Here's why it still looks like a compelling ...