I'm a licensed and insured drone operator, and rather than spending a bit of time reviewing these drones, I've put in many dozens of hours flying these drones, both for testing, flying for fun, and for carrying out commercial work.
I've put these drones through their paces in many countries around the globe, flying them in cold weather, windy weather, and into the mouths of active volcanoes. I know what they are capable of, and I know that these drones will deliver quality photos and video under even the toughest conditions.
As well as testing the camera and flight characteristics, I've spent a lot of time testing the obstacle avoidance sensors. While I don't think that any drone operator should rely on these for day-to-day use, they're a handy safety feature in case things go wrong.
These drones have been tested to the extreme. This is why I've chosen them and am recommending them.