Thanks ladies. I looked at the Maxi Cosi own but some seem to need adaptors and others don't but there doesn't seem to be any conclusive info!
It is more the convenience I'm looking at. I have a Concord Neo which I had for DD1 but we used with the Proton carrycot so we didn't really use the car seat. The carrycot doesn't fit in easily with DD1's stage 2 car seat so we have been using the concord infant carrier but it's so heavy!
Anyway we now have a Cabriofix and easy base which is great, and I have ordered adaptors for the Concord, but seeing as the Concord has no storage (the basket was tiny and ours got eaten by a mouse in the garage) and I've got so used to the one button detach system on the Concord I wondered if there was something similar for the Maxi Cosi.
I tend to put her in the lie flat pram for anything other than the nursery run or a quick dash into a shop so looking for a quick, easy way to get the car seat on and off a frame.