We've used the App for two races now (a Five Mile run and a Triathlon) and have been thrilled with the results. We plan on using it for all our future races.
Very easy and intuitive to use on my iPad. It saves so much time by instantly tabulating results. I was able to record the time of the last finisher and walk right over to deliver the results and awards. Editing is very simple (race day registration, racers changing categories, two racers finishing at same time, whoops I missed a racer, entered the wrong bib number, etc.) There are so many ways to customize the results to fit your race.
Lastly, the support staff is actually SUPPORT staff. They've answered emails promptly as I was figuring out the App with detailed suggestions.