It is worth noting, that comparing fireworks companies based on what materials you get for the cost, is akin to comparing artists based on what amount of paint they use.
To get a more accurate impression of what you will get from this company (if you cannot see them in the flesh, as seen best) study the video's page, to see the quality of Spitfire's work.
Several choices influence the price of your fireworks display, the following factors affect the total:
This has a different meaning between fireworks only and music and fireworks shows. In Fireworks only displays, this refers to the frequency that varying fireworks fire at once increasing the depth of effects and explosions and intensity of the show. Rather than a longer duration show, it results in a more intense and impressive yet shorter show, keeping the pace so fast that your audience cannot get their feet.
With a Music show, this refers to the flexibility allowed for the choreographer, to fire more fireworks and trigger more punctuation's throughout the song. Rather than only highlighting the very obvious musical changes, and missing out more subtle and clever punctuation's. Resulting in an intelligent choreographed piece that represents the fireworks dancing to each beat, rather than just the key areas of music.