For starters, I do agree with the other reviews knocking the functionality. It is not as mature as the Ambit series and while I was initially excited about the smart watch features, I have found them pretty unnecessary. I'm not entirely sure it has anything I couldn't get from the Ambit series, but that speaks more about my lifestyle rather than the watch.
Which I LOVE.
I love to train hard but often burn out because I'm a dummy about tracking my data. This watch keeps up with just about anything I might get up to. The running 24/7 calorie/step counter is great and so is the recovery tracker. Even on rest days I can wear the watch and get an estimate of my effort for the day. In addition to that, having a customizable training plan on the watch makes sure I can't avoid working towards my goals.
I have yet to get it out hiking so I can't speak to the GPS/altimeter features at this time. They track really well during a run around town, but I'll be curious to see if that holds up in the great outdoors.
Overall it is easy to use, the size is great and it is clear it was developed to make sure anyone can have their needs met regardless of the activity. I'm excited to see it improve as Suunto rolls out updates.