It would be really cool if you had a setting(or something) that would let you select a speed that you'd like to maintain and play the audio notification if you drop below that pace. I haven't had a chance to try the challenge yourself yet(Just converted from the lite to the challenge version today), but it seems like this would give me the ability to maintain a speed without having to have previously run that route.

That's a great suggestion, bburton.
I'll look at adding that in to a future release.

Thanks
Gary