LO2 has been using the infant Maxi Cosi Mico in the nanny's car. She is ready for a convertible in the nanny's car as she is at the weight limit. She has already been using a Foonf RF in our cars.

I love the Foonf, but I know there are other options out there that maybe can be used longer, turn into a booster, etc. Plus, the Foonf RF is gigantic, let's be honest, and I think in our nanny's CRV, to ask her to have that in her car permanently, is just too much.

You guys had recommended this Britax for DD1 for the nanny car that we've been really happy with:
http://www.amazon.com/gp/product/B00OTXUO2S?psc=1&redirect=true&ref_=oh_aui_search_detailpage

I had assumed we'd just get the same one for DD2, but it isn't okay until 24 lbs and I just realized it can't RF. So we can't get the same one.

Is there another recommendation you guys can make? Anything that turns into a booster later, etc that starts at 20 lbs?

I actually found this one, that seems to fit the bill:
http://www.amazon.com/gp/product/B0011URFRE?psc=1&redirect=true&ref_=ox_sc_act_title_2&smid=ATVPDKIKX0DER

But I've never spent so little on a car seat and I can't really tell why it's so cheap, like what bells and whistles is it lacking and is it enough to matter? Any one have this one?