My take on this game, like some others in this thread, is a bit more negative:
I think the gameplay was fine, but it has a number of rough spots that I never fully grasped. I also thought the missions weren't always fun and that the game would have benefited from being shorter. I oddly wasn't that impressed by the visuals, though I certainly enjoyed them and the designs. I also think some aspects of the story will be more confusing without playing the first game (hard for me to say, since I had played the original).
I guess my general stance on the game, as someone who 100%ed the main story and side missions, is that it was okay. I enjoyed it, but I also got bored. I'm really glad that some people loved it, but I don't think it's for everyone. Personally, I enjoyed the first game more. If this thread helps someone that will love it discover the game, great! But I don't universally recommend it.
For anyone jumping into this game, I'd suggest not feeling compelled to complete every side mission. I appreciated the story bits and world development I gained, but I don't think it was worth the enjoyment cost. (I wish I could put together a list of side missions that I thought were the most fun or provided the most rewarding stories, but perhaps someone out there has already done that analysis.)