Absolutely brilliant. It restored my faith in the franchise, which had been going downhill, particularly with 3. The characters are brilliant and Edwards progression as a character is interesting enough to keep you engaged.
I'll admit, I wasn't too keen on AC3. In fact, I ended up trading it in soon after I had bought it. So when I heard that ACIV was going to be about pirates, I lost all faith in Ubisoft. Being a loyal fan from the very first game, I decided to give this game a go and try it. It restored my faith in Ubisoft, I have to say. The story wasn't as strong as I would've liked and the modern day Abstergo parts were strange to get used to, but all in all, the characters were memorable and the locations were beautiful. Not to mention the crisp and clear blue sea you spent most of the game travelling on. Though a lot of the missions got repetitive i.e. eavesdrop ones, there was a lovely blend of stealth and fun which I didn't expect to see.