There are very basic (mid-cap value I guess is a little less basic). I bought the Total Stock market fund to get exposure to the entire market. If the market does good, it goes up. If the market goes down, it goes down.

The Target fund is a mix of a bunch of stuff (bonds, stocks, international). The mix is determined by the risk you should be exposed to based on how close you are to the retirement date (gets safer as you get closer to retirement).

I pretty much just set it and forget it.
The good thing about them is that almost all Vanguard funds are extremely low fee.
The performance has been right in line with what the market has done. Up 14% over the year.

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