Sharebuilder's good for what it is: a simple investing platform for investors with relatively simple needs. i've been with Sharebuilder since i started investing about 12 years ago, and while i've had my dissatisfied periods and have gone shopping for another brokerage three or four times, i've always wound up back at Sharebuilder because they have a site whose functions i understand (i should, after using it for 12 years) and if you use their various subscription tiers and their automatic investment plan feature properly, they're the least expensive brokerage around, less expensive than TD Ameritrade, Scottrade, E*Trade, Charles Schwab, and i think i looked at some others as well.

as my knowledge has grown and i've become a more active investor, moving closer to the trading realm, i've found Sharebuilder doesn't usually do a great job of keeping up with me, and if you are an active trader or plan to become one, fugeddabahdit...Sharebuilder is strictly for investing, with only the occasional trade involved. but unless i find something better that i haven't found in all my previous searches, the money i'm not actively trading is going to sit in my Sharebuilder account, earning dividends (which i believe Sharebuilder can automatically reinvest regardless of whether the issuer of the stock offers a dividend reinvestment plan...at least i've never yet invested in a dividend-paying security through Sharebuilder for which Sharebuilder has been unable to reinvest the dividends).