if you liked 2 youll like this one, the map is better imo, less repetitive than florence and venice. the story is on par with 2.
way more side content with leonardo's war machines and romulus' lair. they made the combat i bit harder though with counter-kills being more difficult to do and it was perfect for me in 2 so i dont know why they changed it.
i also dont know why but ezio wouldnt engage enemies before they attacked me even when fighting so i would always take ahit before being able to combat.
i do understand why it is a lots of people favorite ac game.