We have the chicco keyfit and love it. Extremely easy to use along with the stroller. We keep it on passenger side. It does take up a lot of space. I'm 5'11" and can not sit for long periods of time with the chicco behind me....and I absolutely can not drive with it behind the drivers side. Wifey is short, 5'1" and she has no problem with either side. We also have the Britax Boulevard and it is still very nice for my skinny 4 yr old.
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