Who has 2+ kids close in age? How is it?

We currently have a 4.5year old and a 9 month old. This gap for me seems to be perfect. However, we've been talking about trying for another baby, but nothing set in stone.

We met up with my husbands coworker and his wife to have a play date with their kids yesterday whom are closer in age. Their oldest is 15months and their youngest is almost 6months. We were talking about how they like having them so close in age and what not and told us we should start trying for our third. We always talked about sticking with a 4 year age gap. Then recently we started talking about a possible 2 year age gap.

My husband really wants another baby and as much as I would love to have a third, I just don't know if I myself, would be able to handle a preschooler, a toddler and a newborn all at once. So I guess my question is, is it really not that bad? or is more stressful when they're closer in age?