Hi Ed. I just bought the Vicksburg and the Cigar Oasis from Bargain Humidors about 3 weeks ago. The Humidor is awesome and the Cigar Oasis does work very well in this humidor. The only problem for me is that i was only able to put about 300 cigars in it. If i had all corona sized cigars then i would have been able to put the full 500 like advertised, but i have a few large ring gauge cigars and the space realy gets used up quick. I plan on buying the Antitam from Bargain Humidors in another few months and that humidor should do me fine
But to re-answer your main question, the Cigar Oasis works awesome in the Vicksburg. You won't regret that humidifier!
Hope this helps,
Vic