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Title: It does work with the Keyfit 30s
Review: I used this for a good 5 months with our twins and the Keyfit 30 seats. It works. I saw the video on youtube, but I actually put them in a little differently. I put the back seat in first, and then put the front seat in. You have to push it down deeper than you think. It takes a little pressure to get it in nice and snug. But once you get them in and strapped, you are good to go! The seats do not lock on, but you don't need them to if you have them sitting in there and strapped properly. For the price, I got more than my money's use out of it. My only complaint is that you really can't reach the bottom basket very well with the seats on it.
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