If you're considering using E-Trade you may want to consider that E-Trade does not take responsibility if they are hacked. They group cybersecurity events and software malfunction under "Force Majeure" events ("acts of God"). That means if your retirement savings vanish because they are hacked you're out of luck. See https://content.etrade.com/etrade/estation/pdf/10118customer...
Fidelity and Vanguard don't have such clauses. Hope Morgan Stanley fixes this.