I don't know the Quantaray and why it isn't working for you, but I purchased this filter in 2010 because I shoot outdoors; lots of water reflections, contrasty skies, and bright light. I needed the ultra thin to avoid vignetting with wider angles of 11-17mm on my Nikon D90, and now D7000. I also wanted high quality multi-coated glass. I am very happy with this filter--no vignetting, and reduces glare beautifully.
You would, however, loose light, therefore, indoors at higher ISO and wider aperture settings are necessary, but still noise and motion blur from slower shutter speeds are possible, and reasons I don't use a polarizer indoors, though may be acceptable trade-off for your business. I would use on shutter priority at high ISO to avoid blur if your camera has good noise reduction. Hope this helps.
Thanks very much! I appreciate your comments and believe I will obtain this filter to help with my outdoor stills and tours. Thanks again, Tony B.