It's fine when it all goes smooth - not so good when delays and airline troubles hit.
This is a very good point - and another reason for keeping the buggy with you until you board. Also check what child facilities are available at the airports, as these are often hidden away but can be surprisingly good. The kiddies' room at Zurich airport, for example, is better than the business-class lounge (how many lounges have Sony Playstations
and a full kitchen, eh?). At the least, you should find changing facilities, a microwave or stove, somewhere for kids to play safely, and some relief from the throngs outside.