We still use our capsule - Peg Perego Primo Viaggo - it goes up to 13.5kg. Callum is 16.5 months old and just under 12kg.
We have a forward facing car seat in our own car, which C prefers as he can see out the windows more easily, but during the week when we use taxis all the time he's still in the capsule. I can't believe he still fits, but it works great for us!
Would you borrow one to take away with you? Try it out lots before you go and hopefully your DS won't mind it too much