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Pro Great hardware
The headsets themselves are built very well - same goes with the charging case. The plastics Bragi used are high quality, and they feel resilient enough to take a tumble safely. They also have the looks to match the feel.
Pro Zero delay audio
These earbuds use advanced technology (near field magnetic induction) which originated in the hearing aid industry to sync up with each other each time you activate them. This ensures that the audio you hear is perfectly in sync between the two earbuds at all times - which isn't always the case for sets of wireless earbuds.
Pro Standalone fitness tracker
There's a heartrate sensor to track your activity level, and the Bragi Dash is also advanced enough to keep track of your step count and activity duration - all without being attached to your phone (yes, it can play music too so you really can leave your phone at home). Just double touch the left Dash to start tracking, and it will automatically update you when you are finished.
Pro Decent battery life
These can last anywhere from 3-4 hours of continuous playback, depending on volume.
Con Features still in development
While there is a long feature list, most of these aren't ready for reliable use. The heartrate monitors are unreliable, the personal assistant is virtually unusable, and touch-sensitive gestures need a lot of work at well.
Con Poor audio output quality
While there is sufficient bass, trebles and mids are poor. This is very unfortunate for such a premium-priced product.
Con Poor microphone quality
The mic included on the Bragi Dash isn't anything special - it produces far worse audio quality than you'd expect from a headsest 1/3 the price.