Loving the 645 Music so far.
One thing I've found a tad confusing though is the Estimated Finish Time on the "Set a Target" option. I selected Marathon with a target time of 3:59:59. It seems to correctly ish tell me how far behind I am, but the "Estimated Finish Time" was fixed at 3:59:59. Even though I started the activity, walked 30 metres and then sat down for 10 minutes :D
Is this a bug? The manual seems to suggest the Est Finish Time would move to tell me what time I'm likely to finish in.