I bought a Forerunner 735XT from Garmin on Friday to use for the Ultra Trail Australia 100km trail run.
Pros: It was very compact, user friendly and comfortable with a colour screen.
Cons: It was useless!! The distances were out by nearly 30km, (and those of you who do endurance sports will understand how annoying looking at the wrong distance for hours on end can be), and the battery ran flat at 17 hours even though it was on the ultra track setting that was meant to last for 40hours.
I called Garmin, and after 20 mins of waiting on the phone, they told me I needed to download the updates (on their new watch), and try it again. They have't replied to my three emails yet.
This watch clearly has some serious gremlins to iron out. Don’t touch it with a barge pole!
AND it’s not cheap