Live button isn't reliable for me either. n-Track is a buggy piece of shit.
BUT, it does work much of the time. It's also affordable and well-supported. It's got a very DIY homey feel to it. If I ran a professional studio I'd probably buy professional software, which is often just as buggy, but for the immediate future n-Track is my choice.
I've also tried Vegas Pro and Nuendo. While they both had some strong points, I still prefer n-Track.
Tip: once you get n-Track working, leave it alone!
Slackmaster 2000