I have four sons, aged 13, 11, 9 and 1 month.
13 year old - travel system that did everything but go through a door properly. It was super wide, heavy, clunky and very impractical we were always in the car and if I wasnt I was on public transport. My son grew out of the cot part at about 6 weeks old and I ended up going through several cheap strollers... instead of pushing round a huge clunky one. Regretted not spending the few hundred pound on a better stroller instead!
DS 2 - got a Maclaren since I learnt from past experience and laid it back with a footmuff it lasted him until he was able to walk! However I didnt like him not facing me and he looked so tiny and uncomfortable to be facing that way from newborn.
DS 3 - Phil and Teds as DD2 still sometimes needed a pushchair if walking long distances so liked the idea it could look like a single if the double wasnt in use. It looked super comfy for a newborn even though he wasnt facing me. But I sold it when he was about 6 months old, it was too big, heavy and unpractical and bought a mamas and papas stroller instead.
DS4 is only a month old and there is nearly a 10 year gap... so I forgot my experience with prams and went and bought the MyBabiie mb400 travel system. It is nice and light, easy to manuever with just one hand, however at the rate he is growing the cot attachment will be redundant soon and wish I had learnt my lesson!
I think the BEST idea would be a world/parent facing stroller which fully reclines. But I didn't learn!