Yeah, there's no info anywhere about certain models not fitting-no list available that I can find. We have the Maxi Cosi Micomax and it doesn't fit with this adapter. Dud.

These work perfectly for my nuna pippa car seat. I am thankful the costumer service lady knew enough about the products to suggest these to me.

The adapter for the City Mini 2 Double worked as expected for my Maxi Cosi Mico 30 car seat. There is a little trial and error on how to attach, but after the first couple of times - no issue.

Have the City Mini GT Double. Purchased two sets of these adapters to allow is to use the stroller with our car seats. As previous review, adapters fit in the right side of the stroller but do not work on the left. Very disappointing and would not recommend this product.

Although I read a lot of poor reviews, I felt this was something I needed so was willing to take the risk and I'm glad I did! The car seat does seem to "stick" a little when taking it off the stroller but that went away after using it a few times. Also wish the canopy could be used with the car seat attached but I can see how mechanically it just wouldn't work.

My wife and I have the City Mini GT and love it and the easy car seat adapter, so naturally when #2 came along we wanted the double GT and likewise the adapter. We are very happy with both the double stroller and the car seat adapter. It is definitely a little more complicated to attach than on the single, but the net effect is piece of mind and ease.

Its a great product for the relatively short period that you are going to use is.
I wasn't that bad to install, I actually found it more cumbersome to remove it.

I like how sits in the 'middle' when its just the baby riding in it, and then slide it over to the side when you have two children in it. Worked perfectly for bringing my daughter to and from camp/preschool with both children.

Yes it is a little 'high' but you want your babes close you right?
Yes it makes its a little more of a pain in the butt to get in your car - but its easier to transfer a sleeping baby from the back of your car to this!!!