have used it, but i am only a beginner without a lot of experience. the ttrader seems to work okay and quickly makes fills. the price seems to be accurate ( with the proact transact there was a definite delay in prices. always following the market. however i am in the Mideast - Israel so that may be the reason even though there seems to be no similar lag on the tt2) there is a draw back with the turbo t that you have to get used to canceling all orders after a fill, because on my screen there is not enough room to enlarge all the available windows in the program. for instance, the order window works chronologically and if you do a number of trades one of the previous orders could be still open but not visible unless you enlarge that window. a hidden order from early in the day caused me a nice loss. for some reason they only offer a demo for 2 weeks and no live simulation. hope this helps.