I looked briefly at the prospectus and CRFSaver may be right. This statement also concerns me:
The fund's investment adviser has voluntarily agreed to limit expenses. Without the adviser's reimbursement of some expenses, the fund's total return and yield would be lower. A fund's expense limitation may be terminated at anytime, unless otherwise stated.
I'd definitely go with a Vanguard Fund then. One note: Vanguard's lifecycle funds tend to be more conservative than the equivalent lifecycle fund at other companies. If you plan on retiring around 2025, you may want to look at
Vanguard's 2035 fund to increase your stock exposure. Just a thought.