We live in a first floor flat, and we were going to get the Uppababy Vista travel system which has a pram suitable from birth (also good for overnight sleeping) and then a parent-facing seat for when baby's older. I don't have any friends with kids but a few friends have suggested we need not have a pram from birth, especially as the pram/bassinet part will be heavy to carry upstairs from the front door whenever we get home. One friend said her mum just made do with a sling and got a buggy when her children were bigger. Now we're totally unsure what to do! Does anyone have any advice or experience of this?