I've been using Cyber for quite a while and find the software stable, customer support excellent, and order executions blazingly fast. Some folks here claim it's expensive. Compared to what? It has almost the exact same fee schedule as RealTick which is the #1 direct-access trading platform, and it's cheaper than TradeCast and On-Site Trading. Of course IB is cheaper, but you get no Level 2, no charting, no intraday scanning, no alerts, no trailing stops, bizarre reversed logic on all stops, no shorting availability on your order-entry screen, no futures, no check-writing, no time & sales, no account statements mailed to you, no logon from more than one computer, etc. So you don't get what you don't pay for, and IB is cheap.
Is Cyber perfect? Far from it. I've got issues with it's software as I do with pretty much all software. I'm setting up a RealTick account in addition to the Cyber account because RealTick has a number of features missing in Cyber. Will I keep both? I dunno, Cyber allows daytrading in an IRA account, RealTick doesn't, Cyber allows you to logon from multiple computers, RealTick doesn't. I guess time will tell.
The key determinant of whether or not your P&L is positive will be your strategies, setups, triggers, stops, position sizing, money management, psychology. Not whether a trade costs $10 more than a stripped down order-entry system. Look at Hitman's P&L, look at his commissions, see what matters. BTW, I'm not trashing IB because I also have an account there, just trying to show all sides.