I have the Chicco Key fit 30...And the Baby Jogger City Select Lux. I purchased this adapter and if you follow the instructions the assembly was easier than I expected. HOWEVER...when I put the car seat onto it, there was no click and it would not sit all the way into the adapter. I was furious and ready to return it. Later I looked all the way thru the instructions and in the fine print I found my answer. Do not use bar C for the Chicco Key fit 30. It is there for other car seats. Take off bar "C" and your seat will click right in place! This detail needs to be more clearly stated so I hope this helps people. 5 stars for the adapter, but 4 stars for lack of clear instructions!

Bearing in mind that there are 3 characters in this sad tale. The Nuna, the adapter, and the City Mini Zip, it's hard to place the blame on any one of them individually, and it's also hard to pinpoint what exactly is wrong with their relationship, but long story short, this is NOT a good mix. You have to remove the canopy for the car seat to fit properly, if your child weighs anything over 14 lbs, its impossible to get the carseat off the adapter without some sort of leverage. I used to jam the stroller against my car, a wall, a willing helper, but I could not just press the buttons and lift off the seat without the stroller coming up with it. It is a very tight fit. I would say its a matter of millimeters of clearance when putting the seat on and off the adapters.

The adapters stick out very far, so when you fold the stroller, though technically you can fold with them attached, they add a good 4-5 inches to the length of the zip stroller when folded. They stick out so that you accidentally jam them into the sidewalk and snap them, or into another person.

As previously mentioned, there is very little wiggle room for error when removing the seat, the same is true when putting the seat onto the adapters, once my baby got above 14-15 lbs it was impossible for me to put the seat onto the adapters with him in the seat. I started taking the car seat out from the car, taking the baby out of the seat, aligning the seat on the adapters and clicking into place, taking the confused baby off the back seat and putting him back into the car seat, now attached to the stroller, and dreading having to remove the seat at the end of our outing. This may work better with other car seats, but the Nuna - Zip combo is not good.

I was worried that the Chico fit2 would not work with this adapter. I could not find any write ups on it. On the adapter with the fit2 and the Lux stroller. Works with no problem!!!!!

This works as advertised. My only complaint is that even though everything locks together, the carseat rocks ever so slightly back and forth. It's not enough to say I'm not going to use it because you can tell it's not coming loose, but I was expecting a super solid perfect fit

We followed the instructions and only used the A&B bars, leaving the C bar off. The rectangular frame formed by the A&B bars is about a half inch too wide for the Keyfit to click into. I even took the frame off the stroller brackets and flipped the carseat upside down to see if maybe there was an obstruction keeping the carseat from clicking into it, and nope - it's not manufactured to the correct size. The photos for this review are of both sides of the carseat showing the adapter frame is too big. The carseat still sits in the frame, just not securely, so we'll use it anyway - we'll just make sure the baby is strapped into her carseat really well. We're overseas so trying to buy a replacement is not worth the hassle. We're disappointed in the poor fit for the price.