First of all I like this drone because it has a small size and can be taken anywhere. The image quality is very good and you can take beautiful pictures that reach 100 m depth. I would use it on holidays. Because it has 6 thrusters and 5 different degrees
freedom, it can be moved very easily in different directions.
Another plus is real-time transmission of photos and videos through cable.
After you finish the work, you can collect the cable easily and quickly with a special tether deploy system.
I think everyone would like a drone : D
"I would use it on holidays" ? This is a 4.5K USD toy!
The last thing I would do would be to waste 4.5K USD on this if going on holidays. I agree that it is an amazingly interesting toy to play with, but still more indicated for research than for leisure. Unless you are rich... and in that case, you can just buy a submarine instead =)
Thanks @allesia, I like your comment.