(disclaimer: I got it mostly for free, so I can't really feel like I have wasted money on this)
I like it. I don't love it, I don't play it every day, but I like it.
Some things are nice, and remove some of the usual "wasting my time" feeling.
For example, once you find a weapon, you have it forever, so you won't have to go in a "hiden weapon" to get a sniper before every assassination mission. but it also means that after a few hours, you always have dozens of weapons on you, and that you won't use most of them.
It also really fells like a console port, if you play on PC. The mouse menu is horrible (you kind of drag your mouse to navigate in a menu supposed to render your smartphone screen), The category selection with the mousewheel is bad too, and the skills/achivements display is not intuitive : you have to use the arrows instead of WASD that is used everywhere else in the game...
The game is not that beautiful, and some effects are just annoying : you just can't drive facing the sun in the morning/evening.
In fact, the whole game feels like a GTA, except more arcade oriented, with the "hacker" skills being really "push a button" plus the "slow motion" thing. The "stop the convoy" missions can be really fun, as you have some nice options (with bombs, sniper rifle to kill drivers, hacking bridges/spikes/blockers, rerouting them with well placed vehicules, and heavy vehicules being capable of pushing them where you want).