What I learnt from two days of car seat research about convertible boosters - long and boring :-)

[Doing my best]

Thank you for your findings in research. I was following the other thread too as I was looking for narrow seats, for similar reasons to you, small car and not being able to fit anyone else in, and dd has outgrown her current one at 6 years. I was really interested in the infa ones since they are very narrow, but the height wasn't enough. I ended up getting another safe and sound hi liner as that was the only one that gave the height I needed.. And reluctantly gave up on my idea of possibly fitting a 3rd person in the back.

[Heaven]

Thanks wysiwyg! That's good because she's nowhere near outgrowing it height-wise either.