I've been using Etrade for 10 years. For some reason, I got it in my head that OptionsHouse would be a better service. I moved one of my accounts over there and just moved it back.
OptionsHouse doesn't give accurate quotes for the preferred. I've also noticed that you cannot make arbitrage trades in a cash account (Roth IRA) because the buying power updates the next day. I usually swap my preferreds right away to avoid losing the optimal price point.
Since I paid $2600 in commissions on my trades in the first six months of the year, Etrade reduced my commissions to $4.99. That was to entice me to bring my account back. I think the execution is better. I think Etrade's problem right now is that they are trying to sell too much other junk to people and don't realize that they aren't being competitive with the discount brokers that are undercutting them on commissions.
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