My boys are 14.5 months apart, now 2YO and 3YO. I'll admit going into the pregnancy totally unprepared for the reality of a toddler and a baby; my guy was 6MO and I was so in love and I wanted another (he had just started sleeping 12 hours a night so I had plenty of extra energy
It was so hard! I was sick and exhausted with a newly mobile baby, and right after his 1st birthday I went on bedrest for preterm labor. Luckily I had family around to help.
I never went through feeling that I lost my oldest as my "baby"; he's still such a mama's boy. I think he adjusted well and didn't show any real jealousy until #2 was 6MO and started sitting and crawling. It was pretty tough from that point until the baby was about 18MO and became a true friend and partner in crime to his brother.
I remember being so tired from being up every couple of hours, and still having to get up and face the day with both boys. #2 got a bath once a week, seriously, and sometimes we went longer than that. My mom would bathe him whenever she visited. The days went by in a blur. I never went anywhere because it was so hard! I had a terrible case of PPD even though I was on meds.
Now the problems are different, but still there. I think two close in age play well together, but they also seem to squabble more often. They can both run away from me. Going someplace with other moms who only have one child (or only one younger child) is often a comedy as I try to keep track of my two boys.
There are rewards, of course. They seem extremely close and are very loving toward eachother. They play together very well for the most part and they share the same toys and interests. I don't worry about planning activities that are too mature for one child or too childish for the other. They like the same books and music. The hand-me-downs aren't too outdated. The oldest learns to share his/her parents at a very early age and usually doesn't remember the time before the sibling was born
I love seeing them together, and I believe the difficulties will be worth it, but I won't do it again. If (and it's a big if) we have a 3rd child I will wait until the boys are at least 5 and 6.
My brother and SIL have boys 12 months apart; in fact all 4 boys were born in a 20 month span. We both love the rewards of having closely spaced children but believe that there are compromises made.