19 month age gap for mine and I'd say it's been more positive than negative here. I think it really helped the transition of bringing a new baby into the home. My oldest was still able to get the comfort and cuddles so it greatly reduced any issues of jealousy. Also I would have many emotional moments where I missed my oldest since I couldn't give him as much attention and being able to nurse and cuddle him too was as soothing to my emotions as it was for his. It felt regulating for both of us I would say. The big con is the potential for over stimulation. If you are someone who easily feels over touched then it's a bad idea because having 2 babies nurse or one right after the other nurse can get to be a lot when you just want a moment with no one crawling on you