Used our Babyzen from birth (2 1/2 years) been very happy with it.
I would get the travel buggy from Nuna
1000% the yoyo. At the airport they literally ask “is it a yoyo?” at both check in desk and when boarding. I’ve never seen another buggy allowed in cabin (and those that get checked at gate often have to be collected at the baggage carousel on arrival, so you’d have to trek through arrivals, passport control etc before you get it back. I’ve been there- it’s not fun holding a (tired) baby and hand luggage at the same time!
I’ve used my yoyo every day for 2 years. It’s done about 30 flights, the Eurostar, road trips, snow and sand. It does London public transport every day too and I still love it.