Ranked in these QuestionsQuestion Ranking
Pro Cross platform
Supports Linux, Windows and Mac.
Pro Polished GUI
The gui looks great and is easy to use.
Pro Open source
Free to use and modify. Apache license. Repository link: https://github.com/resin-io/etcher
Pro Relatively fast
Flashes/burns images relatively fast.
Pro Extremely user friendly
By far, the most user friendly and straight-forward UI I've ever seen in an application like this
Con Large file size
Much larger file size in comparison to something like Rufus.
Con Lacking in settings
Compared to its competitors, while trying to keep the software as user-friendly and clean as possible, it also lacks the ability to perform more advanced tweaking, available in something like Rufus.