The iPAD EFIS app is fun. On the plus side its cool and it extends your flight sim setup wirelessly. On the negative side I suppose you could say its cost at £13.99 is a bit steep compared to other apps. I would add as well that occasionally it hangs. This means going back to the iPad home page and jumping back in to the app to rectify the situation. Most of the time this means it still remembers what you have setup however sometimes I've found it doesnt. This means redoing your flight plan again so that you can see how far you have to go in the map.
Actually another negative here is that the flight plan setup is not that intuitive. You need to do this so that you can track towards a nav Aid easily on the map. In this sense you will get a coundown of the distance to go and the estimated time. Buy or No Buy? I woud say it's a bit gimmicky so if you think of it like that you wont be that dissapointed.