I have a bugaboo cameleon and when DS was little we used the maxi cosi capsule with adaptors, I really love both items, I've never had any issues with the bugaboo and I love it , expensive but worth it IMO- its a bit bulky to take in the car when you are no longer using the capsule / adaptors so I did have to get a McLaren which I dont particular like but its lightweight and takes up less space.
Hope you've figured out which buttons you need to press to release the capsule from the adaptors