Have one and it's great. When I used it (I don't any more) it was so easy to push, very light, and never had a problem fitting through (except from one specific changing room ...). Would definetely recommend it.
I got mine when dd2 was born (dd1 was 15months). Used it until dd1 was 2.2 I think. After that she dedn't really want to be in a buggy, so she either walked, or she now jumps on the back of my citisport on the basket rim. I tried buggyboards but she is a bit too young to hold on tight, so leaning on the handle of the citisport works better (she is now 2.7).
For 10 months and 2.5 years I don't really think it's worth the expense (plus it's going to be a bit heavy soon...)