Garmin Forerunner 745, GPS Running Watch, Detailed Training Stats and On-Device Workouts, Essential worth to buy? Thanks for it if those of you who have purchased Garmin Forerunner 745, GPS Running Watch, Detailed Training Stats and On-Device Workouts, Essential could share about what you think of the product. I would love any extra info, as it is quite pricey as $499.99 and I just want to know it is good before paying for it.