In a previous incarnation I was involved in a software development business.

I just activated my trial subscription to Trackjack.

Conclusion: Kudos. My compliments to one and all in Trackjack's development (parties unknown) and operation (Victor & Bettie). It is a fine piece of software.
And without bugs insofar as I can see.

It's value to a serious player is obvious. No, I should say, it's a necessity to any serious player or would-be serious player.