They created a really high expectation, they lied.
Prepare to have the opposite experience of what you got with masterful games like the GTA series, where you are surprised by the tech, look and feel, and gameplay mechanics at every step.
The game, in many areas, feels alfa version, some concepts llke AI and the promised natural life like feeling of the city, characters and animations are so off, they need to be redisigned from the begining with other technological approach. Needed a couple more years of work at least.
I think the 5 stars reviews come from new gamers having their first experience on games of this genre.