Hi
I've got this pushchair for my 9 month old! We've had the 3+, the car seat and isofix base and the carry cot. It's been a really good system for us - good all terrain use and really easy to put up and down.
The carrycot last us less time than we'd have liked, only because Daisy is VERY tall, so she stayed in it until nearly 4 months. At four months, because although she's tall, she's tiny (weight wise!), I really had to pad the pushchair seat out for her so she was comfortable, but I did this with a headhugger and a Buggysnuggle base (to which I then added the top for the winter!) - that would be pretty much my only complaint!
I'm thinking of selling it all just now as we've moved her into a forward facing car seat - I think I may just get a stroller as it does take up most of the boot and I need to be able to get the dog into the boot as well at some point!
HTH
Any questions, please ask!
C xxxx
Life is like a box of chocolates... you never know what you're gonna get... xx