Bio-Spiria has had some good results and accounts from a lot of people if and only if handled, shipped, maintained and used properly...
Secondly, it is packaged in a media that will help to sustain the colonies for a very short time.
However, there is NO susch thing as an instant cycle. Just doesn't exist. If so, I would purchase a tank tomorrow, throw in the recommended spiria and fish and walk away until I did my weekly WC...
Personally, I would treat spira much like one would a small seeding from using media off of another tank. It will still require time and testing to ensure the proper conditions as I am sure there will be fish involved.
Ammonia (or a shrimp) can be used for a pseudo-type fishless cycle process, but if so, it is essential that you do not over-dose the concentrations (say max of 4ppm)