I made the 24 month size, but except for the usual raglan bagging under the arms it's an almost perfect fit for a little boy who's otherwise not quite grown into his 18 month clothes. I think I probably should have made the sleeves and the body longer than the pattern called for, if only so he could wear it for a while longer, but I so wanted this to be done.
I have much more yarn leftover than I thought I would, which is exhilarating. It's so soft and scrumptious. I don't know yet what I'll use it for, but I foresee much Ravelry browsing in my future.