[kristinecfp]

The Fidelity Freedom funds are no load, so you will not pay a commission. They do however, have an annual expense ratio (all mutual funds do). The expense ratio is higher than Vanguard's but that doesn't necessarily mean that Vanguard's Lifecycle funds are better (I like Vanguard and Fidelity - not bashing Vanguard by any means).

In addition to annual expense ratios, you also need to compare fund minimums, performance (for similar funds), etc. If the Vanguard funds and Fidelity funds are very similar, then you would want to pick the fund with the lower annual expense ratio.

Hope this helps,