@MilsCookie they are just fabulous buggies. The big wheels go over all terrain. I've seen so many friends cursing the fact their travel systems, as lovely as they looked when they first brought them, once they are post six months and discover that other then on hard, and more importantly, FLAT tarmac , they are practically useless. They also often have much shorter stroller seats so that side of things isn't often comfortable especially of your baby is long/tall, or you just don't want their legs hanging very close to the ground by 18 months. They then have to buy another stroller with sturdy wheels and a big toddler seat after spending loads on this bloody fancy looking newborn carriage that has been used just from house to shop, or house to library/doctors/in laws ect. You really only start 'using' your pushchair once they are in that main seat, and use it you do! It need to take abuse, serious abuse, it needs to support multiple bags of shopping, go over beach and grass and mud. Stay dry in the rain, and take unfolding with one hand for trains and buses, for taxis, for holidays even.
Often when first time parents but then they go on the first six months without thinking how absolutely knackered the buggy is going to get, it will take a kicking and these small wheeled light framed travel systems are honestly pieces of crap. Especially the car seats, they are just neoprene or polyester stretched over polysterine! Yes they are a must but they are an absolute rip off. For the car when my last was six months we actually got an AXKID MINIKID which is one of the only car seats that passes the swedish crash test, the most strict in the world. It is an absolute beast, very expensive one but it last untill 4 years and is rear facing from 0 all the way to 4.
The mountain buggy gives you those things from day one. The wheels are the absolute most important thing. If it has small wheels discount it immediately. You litrally cannot go on grass even unless you have decent wheels and preferably air filled ones. Though the best are obviously the hard ones, which actually I got to replace my air filled ones. A set of 4 is only 69 pounds so worth it to an extent. But really I've repaired 1 puncture in the 2 years previous to having the hard ones on my swift so it's no big deal. All bike repair shops will sort a new inner tube or puncture repair of you or your partner can't figure it out. I have zero self fixing skills so I understand this!