Second largest battery in an ultrabook next to Dell XPS 13 60WAh (as of late 2017). 8 - 10 hours with medium brightness and TLP on ElementaryOS. Watching video drains it quite a bit faster though.
Slim, light, metal build, strong hinge, large battery, great keyboard (soft, good key-travel) 7th gen core i5, 8gb RAM, 256gb SSD, 1080p IPS display and back-lit keyboard for $700.
At times there can be some coil whine (as is common in ultrabooks), but it isnt terrible. The fan isnt and issue in normal browsing or document editing, but in anything remotely intensive it will spin up and is noticeable.