Turns out I was right. Back in my Afterbirth release article I mentioned how even after a few hours I could confidently say that this is an excellent piece of DLC, and now, some 20 hours of play later I can even more confidently restate that.

The Binding of Isaac: Afterbirth is in my eyes the best kind of expansion/DLC, it adds new features and improvements to the base game without ruining what made the base game good. Every aspect of gameplay has received some improvement, from simple things such as new items, room layouts and enemies which shake up the usual flow of a run to more obvious additions like the new greed mode and daily challenges.

This does however mean that if you did not like The Binding of Isaac: Rebirth then Afterbirth won't be changing your mind any time soon, but for the rest of us this is one solid expansion.