Well, after a week I believe I finally got all the medals...
OK, the game itself was very fun up until I reached the wallet, after that... It was addicting all right, and I did felt the need to get going, but it never felt as fun after that, it was more like grinding: just doing stuff to get more stuff done and the cycle just repeated itself over and over again.
I believe this is mainly because I reached a point where my input didn't seem to do much, since by starting a game but not doing anything (like say, switching tabs and doing something else without pausing) I got the same amount of money that if I really played.
Still, It really became a time killer, and all the time I kept going just to keep unlocking stuff and finishing missions.
Overall, a good game that never was quite great due to its tendency to enter into cruise control.