About 8 hours in, still doing Detroit side quests, exploring everything possible. I adore this game, warts and all.
I'm using a mix of stealth and (lethal) guns, and having a blast. The weapons look great and sound powerful, and are fun to shoot. Even the reloads are authoritative and satisfying. Sure, it's not as refined and responsive as a dedicated shooter, but I'm quite pleased with it for an RPG. I'm not having too much trouble with ammo, either - over 90 rounds for the pistol, over 100 for the assault rifle.
I never want it to end. Experiences like this are so rare I want to savor every moment.