Sorry to hijack for a wee bit Persephone! We are looking at both at the moment as well, QM - the Ibert looks really teeny? Is that just the photo though?
It's a nice size, might look small because it doesn't have a high back? Here is Punk in ours when we first got it. I think they are supposed to fit until around 4yo, but Punk is tall - haven't had her in it for a while because a) Too lazy to pump up my flat tyre & b) Big'ol bump in the way lol.