I really like the coach feature. However the live pace accuracy makes the interval training and even the easy runs difficult to follow. On an easy run I'll auto lap and my lap pace is 10-15 seconds faster than anything I saw on live pace. For intervals, the delay makes it near impossible to know if you're anywhere near in band especially for short intervals.
I did a coach plan on a 245m and felt like I never had this issue.
Garmin, please improve the live pace feature to get more out of the coaching plans.