Hi, Mark -
I've used it a few times, but judiciously. I was happy with the results and had some fun with one song (the result was not what I expected, but was pleasantly surprised). But as I understand it, the hardware units are much better. However, you won't find a hardware (or even software) unit for the $59 price of PowerTracks, however.
Of course, if you have RealBand, then you have BIAB. BIAB has the TC-Helicon also, but I've found it much more flexible to use in either PowerTracks or RealBand (linked to PowerTracks).
John
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