I have started using Panorama Factory to produce QTVRs and it is just fantastic. I've been making QTVRs for over 10 years now and for most of that time I relied on vrworx. Recently,  I started hunting around for alternatives and after testing a bunch of stuff decided on Panorama Factory. Nothing against vrworx, but $299 versus $60 made it an easy decision. vrworx has more features, but I never used most of them and, all in all, it is harder to use and seems to generate QTVRs of lesser quality from the same set of photos. With Panorama Factory I literally just point, shoot, rotate myself a bit, and repeat, no tripod and no real effort to maintain a level plain, yet Panorama Factory kicks out QTVRs of more than acceptable quality. It is PC only but well worth a look if you are interested in creating your own QTVRs, or even just wide angle panoramic shot.