Training- Garmin 310xt

Just started using the Garmin 310XT as a training tool.  What a cool device.  Was wondering if anyone out there uses this model.  Never really have used devices consistently in the past and its my first time having a coach, Jamie Whitmore, XTERRA legend and former world champion. Check out her site for her contact info: http://gutzytricoaching.com/

I think I'm getting the hang of it. Jamie's work out for today was a 1.5 hr run: 20min warm up, 15min in zone2, 20min in zone3, 15min in zone4 and cool down for the remainder of the run. I set time, distance and HR zone fields on my display so I can look at what zone I was in every once in a while.  I also set a time alert every 5:00 min to keep track of my time in each zone(three beeps in zone 2, 4 beeps in zone 3 etc).   Auto lap was on at every mile. Finally I set min HR zone 2 and max HR zone 5. The Garmin alerted me if I went below zone 2 and above zone 4. This was helpful.  So I successfully completed the workout but it seems like I could have programmed the Garmin differently to make it easier. I had 3 different ring tones alerting me. Crazy. I have used the interval feature and maybe that would have worked better. Here's the workout file on: http://connect.garmin.com
What do you think, any tips?