I’m debating buying one for DS 18months. It would be the S1 model. We live in an apartment building up several flights of stairs with no lift. We’ve got a trike already but I never ever use it because it’s too difficult to carry down the stairs while also carrying DS. I can do with him in a baby carrier but if he’s wriggling it doesn’t feel safe. The Liki trike appeals because it folds up! I manage fine with the folded-up buggy and DS but he’s always trying to ride on other children’s scooters and balance bikes at the park so I thought he might really like something he can control more himself. If you have one does your child love it? Do you find it easy to fold and unfold regularly?