Editorial Review Ally Invest Review 2020: Pros, Cons and How It Compares. Our choice for one of the best low-cost brokers, Ally Invest does it all — but it's especially good for active traders. Ally Invest Review 2020: Pros and Cons Sep 05, 2014 · Ally Invest Review: Pros and Cons. By Cynthia Cohen. It slowly expanded its financial services and was rebranded as Ally Bank in 2009, offering online banking with high interest rates and minimal fees. In 2016, Ally Financial acquired TradeKing, It's hard to beat Ally Invest's low cost of $0 per stock trade. But website is more basic