With the latest 2.6.0 update of Tintii, this application and plugin is nothing less than amazing with the ability of being able to intelligently isolate colors with a remarkable amount of control through its post processing of color delay, edge, and hardness in tandem with its color adjustment capability.
It's quite obvious that the developer's impressive photography skills have guided his work towards creating such a powerful tool for other photographers to take advantage of in furthering their own personal visions in what they've captured with their cameras.
I also found the in-app/filter Help very thorough in explaining how to best take advantage of its capabilities, giving the user many options to consider and experiment with in finding exactly the look and feel they're looking for in their photography.
Perhaps most importantly, the developer is very responsive to feedback on this app/plugin with an obvious interest in improving an already excellent piece of software.
As I was mostly interested in using Tintii as a plugin within Photoshop CS5 on the Mac side, I downloaded and purchased it through the developer's website rather than Apple's App Store, which only offers the application.
Using Photoshop for the past twenty-two years on a daily basis in my career tells me that Tintii is an all-around winner and an excellent value for photographers and graphic artists.