I use Vanguard for my investing. John Bogle is the founder. I have investment account, Rollover IRA from my company's 401(k), and a Roth IRA. I typically invest in Vanguard ETF's - that Exchange Traded Funds - these funds are similar to mutual funds but the share trade on the open market. Mutual Fund shares are valued at the close of business each day and that's the price you buy and sell for that day. So with a mutual fund, you never know what you are going to pay for the investment, only what you paid..
ETF's seem to have lower expense costs than most mutual funds. I looked at the 10 year history of my 401(k) and realized I was paying over $1,000 per year for the 401(k) managers, then the funds they offered had expenses in the .55% to 1.04% range. Well, it doesn't take a mad scientist to know that I'm enriching the 401(k) managers and the mutual funds first, then I get what's left. I discovered I could roll most of my 401(k) investment into a Vanguard Rollover IRA and manage it myself. I figure I'm at least 1% ahead of the 401(k) since the ETF's expenses are .07%.
I like the Vanguard website, I can put other investments into the Accounts & Balances screen and see what's happening universally with my investments and retirement accounts. It's easy to electronic transfer balances between my local credit union and the Vanguard account.
My investment strategy is still mostly growth stock funds even though I'm over 60. I just don't see starting to buy dividend paying stock funds to create cash flow especially after the 30% run up in the Dow Jones Industrial Average over the last 22 months.