Anonymous wrote:PP above me is correct. There is a price to be paid for simplicity when it comes to investing. They are generally not very tax efficient, especially if you are in the 24% or above tax bracket. If you are in a high tax bracket, VTMFX is solid.When they have to rebalance, often you will get nailed with capital gains. It's usually not THAT big of a deal, but it is an issue. A better and equally simple option would be a LifeStrategy fund from Vanguard. Their allocations are fixed and there are many people using them in a brokerage account, so administrator are less likely to screw over taxable account holders.
This. The largest disadvantage with target date fund is when they rebalance as they get more conservative you will incur gains. You're probably better off with a fund that does change with time