We must be twins, in regards to Vanguard and Bogle.
But I'm not sure about this fund. It's low expenses, low turnover, which is good. And they can shift from stocks to bonds to cash as much as they want, as much as putting 100% into one of the three. That adaptability should be an advantage.

Yet you match their chart vs. the S&P and there's little difference. So you might as well go for a total market index fund.