( My Broker of Choice )
ThinkOrSwim
When I first discovered TOS, I was impressed as much as back in 1996 when I moved my account to DATEK. I think TOS is as cutting edge today as DATEK was before Ameritrade acquired it.
Multiple fee schedules for every taste and they open for negotiation based on your trading volume.
Execution speed - if it is marketable order - I have not finished pushing "send order button" and message popping up confirming executed order. W O W
In addition when you place an order you SEE your order on level 2 ( based on your order ID)
The only broker I know who communicates REAL time any technical problem with traders over popup messages.
Desktop Trading software is on par with cockpit of space shuttle...and it WORKS...and it works so fast with such a huge amount of data transmitted that I keep wondering "how did they do that?". No delays, no hiccups, no problems.
( There is also Web Based trading, Cell Phone Trading, Pocket PC Trading - they got all covered )
Education they provide is THE BEST free education. PERIOD.