We LOVE the Quinny Buzz.  We bought this for our second child.  It pushes so easy and has an adjustable handle for different height people.  It turns on a dime and you can push and steer with one hand, which is nice when you have a toddler looking for you other hand.  We have gotten a ton of compliments on the stroller and would highly recommend it to all parents - it is definitely worth the investment if you use your stroller a lot.  The Maxi Cosi carseat attaches right to the frame or it has a seat attachment.  You have to take off the seat to fold up, but it is pretty easy to pop on and...