Tried this lib out yesterday, replacing an existing organ track in an old song of mine with each of the Vital Organs instruments and comparing to the original. I'd always been unhappy with that particular organ part, having used a patch on my Yamaha MO8 for it at the time that wasn't very exciting. Sadly, none of the VO organs did better.
This library will be useful to you if you don't already have something better. Even one of the freebie B3 sims out there would, I think, be more useful. It's not that the library isn't good - it is - it's just that a Hammond isn't a good candidate for sampling.