“Don’t think Garmin is intuitive, need to work the most screens! Probably makes the 840 worthwhile as it has touch screens. Has frozen a few times, think it’s to do with paring to heart monitors etc.
Clear screen lots of added features to the 510! Good but not great overall!”
“Easy to mount and update. Took a little bit to work out how to use it, but easy once you know. Can see the screen in bright sunlight. Battery lasts long time between charges.”
