I don't think you will benefit from the Drum Dial. Like others have said, it will get you 80% of the way there, but with enough practice you should be able to get yourself 80% there with a normal set of drums within a minute and the rest of the time is fine-tuning. It's just practice. The best way to learn is to use thin heads (I'm an Ambassador man myself) and it is all about feel. I can feel when I'm getting there. Just practice.
I'm less enthusiastic than in the past, but I still feel it's a valuable tool, especially as a training aid for somebody like the OP. The ability to generate a consistent tension reading helped me diagnose a bad edge on my tom, that I would have otherwised assumed was just not a really good sounding drum. With a properly cut set of edges, my toms sing, and I have no urge to go drum shopping.
I have always fine-tuned after drum-dialing, but the dial gets you much farther than 80%, probably over 95%, and for a newb, trying to tune by ear from scratch will get you to a point that you can't tell what's wrong, and you'll just keep aking it worse by guessing wrong.
Also, the repeatability is great. I can go to the studio, record a drum, go back a year later with a fresh head, and duplicate the sound in a minute. That's pretty sweet. Also,you can tune to 95%/good enough in silence, or in a place where background noise would make pitch tuning extremely difficult.
That said, I rarely use it, and couldeasily live without it. I definitely got my money's worth, and don't mind having it around.