The difference between .17 and .029 isn't that huge on a returns basis.
Many vanguard funds can break <.1% fees.
Vanguard funds have more options available.
For the love of god, don't invest -only- in the G fund.
It's your money, and don't think that any of the words I just said matter much in the end, because you're basically choosing between a Ferrari and a Lamborghini. Either way, they're freaking sweet.