This game started a bit rocky, but...
It started a bit messy on the technical side of things (PC specifically, but consoles as well from what I heard), and still isn't perfect, but it's a REALLY FUN game!
The episodic nature fits it better than any episodic game ever has achieved, that I can think of. The numerous challenges are great and keep me coming back to do everything I can in each level and unlock all the cool gear and options.
I think the Elusive Targets are a fantastic idea and they're extra fun overall, but it was a big mistake to make them only playable for one weekend only each (& not announced much ahead of time) - most people will miss out on some or all of them, if Sqeenix doesn't end up changing that. They could easily still apply the same rules (no screw ups or deaths, no saves, etc) and general time limit, and just make it start when you first attempt one - not dependant on you have had the game since launch and are logging in every day to check for new Elusives, or not to mention the fact that even the hardest-core of players may not be able to play some weekends for many reasons.
I think they need to keep working on the technical hitches, but so far they've improved it a lot. As long as the unique content keeps flowing and they keep improving the performance, animations, mechanics, AI, etc... this will go down as the best Hitman game yet and one of the best games in recent years, in my opinion!