Exec26,
My experience with Tradestation Pro has been fairly pleasant. I have used Omega products for years, the interface is familiar to me.
Most users complain of lagging quotes, I cant say it never happened to me, but on balance it is very quick and stable. From another's post I've learned that the 2 week trial data seems to come off another server (I have not verified this through Omega) and appears to be the source for the poorer quality data. Since the latest upgrade it has been superlative, faster than CYBERTRADER. I am trading NASDAQ high flyers with entries and exits based off of tick charts - The data is timely or I could not do this successfully.
The reasons you may wish to use Tradestation are:
*** Visually stunning chart's -- they are they undisputed leader here.
*** ELA programming -- an industry standard, virtually any idea can be coded.
*** Cost
*** System Research & Backtesting
*** Integrated brokerage, Bear Sterns, (in the interest of disclosure, I execute through CYBERTRADER)
The aforementioned represents my opinions and experience.
I hope this helps.
-Hoyler