I've been comparing it to the Wurlys I have here on hand: the EP engine in my Kronos, Lounge Lizard Session, and Keyscape.
Of the four, the Indiginus has the best "clean" sound. Keyscape beats it for dirt, though. As with most sampled EPs, this one will likely benefit from a good outboard amp sim for dynamic grit.
To answer your (rhetorical?) question, ol' pal, if you've already got a handful of Wurlitzers in your arsenal - as I know you do - then this would probably be superfluous. For me, though, I don't, and it isn't. I'm going to install this on my laptop and see how it cuts through a rock band tomorrow.