MOST mutual funds haven't been able to consistently beat the market, the ones that have are worth it. I agree with Z in saying buying a large cap MF isn't a good, buy, compared to an ETF. I was thinking about buying a five star "energy" Canadian MF, a while ago, but noticed that it shared a practical +1 correlation with the TSX energy index, so in this case, it would be best to buy the I-Unit instead of the MF, especially with the fees involved.
I agree with 26's statement that although MOST have not beaten the market, the ones that have are worthwhile. I subscribe to 10-10-80 rule for most things: 10% of something is great, 10% is terrible and 80% are mediocre. Unfortunately the ones that are great and start to get hyped, get closed, Resolute was a great example, something like 80% return over the last year.
Another advantage is you can get into some neat global funds too that are worthwhile; I've invested in some Indian and Chinese funds.