I've got the silver cross Brompton, basically the Pioneer with a fancy coat. Bought it for DD who is 8 months now.
If I could change it I would, it looks beautiful but it doesn't cope at all with lowered curbs - or any uneven surface.
After about 10 weeks I only used the maxi cosi i-size car seat on the chassis as having to dismantle it and fit it all in the car was a nightmare. The buggie part also has to be dismantled from the chassis when putting it in the car.
I wish i bought the Mamas and Pappas pram which folded down in 1, no dismantling. The pram part changed into the buggie so no separate parts and it got much better reviews.
Everyone is different tho, and it does depend on what you use it for, types of surfaces you will push it on, and whether you're dragging it in and out of a car etc. But definitely research independent reviews to death. I saw all the bad reviews but couldn't see past the lovely design 😁