I love the "Later" option for planning trips but the reminder notifications go missed quite often. A few options would be great.
1. Make a Calendar event (or part of an existing one) so that reminder alarms can be used based on your default settings. If it would adjust to 15 mins (or user determined) before you need to leave that would be awesome.
2. Allow the user to set the time before you need to leave... getting a reminder saying "Leave Now" is not realistic... let us decide how much time we need before the "leave by" time.
3. Allow the option to set an alarm using the clock app