I have the Mavic and I am pretty happy with it myself. It's not perfect, but it's generally the best drone I have used (the range is the best you can get, camera is pretty good, portability is great, battery life great). The only drone better is the Phantom 4 Pro, which is $1500 if I am not mistaken.
Is it worth the price? Depends on what you are using it for. Also, if you do buy it, make another DJI account, generate an affiliate code, and use it to buy the Mavic via their website. That way you can use the $50 credit to buy yourself a second battery. Also keep in mind that if you want to use it professionally and are in the US, that you need to get the Part 107 licensing by law.
DJI actually has some systems in place to prevent illegal flights. By default it only goes as high as the law permits and can't enter no-fly zones (as if there were a force field). Even in smaller airports, the app will alert you to fly with caution (for example, in class C airspace) You can override these limits, but, as far as I know, the event is somehow logged.
This line is pretty common in ToC's as far as I know (I'm no lawyer). It allows them to show the images on the site and in advertising. Nothing too uncommon, and most of it's needed to make the site work.