This is our second Keyfit30 (first Keyfit30 zip) which is for our 3rd child who is due in the spring. Chicco provided this product to me in exchange for my honest opinion.
REASONS I LOVE THIS CAR SEAT:
Number one-- It is super easy to install in your car. The instructions are clear, the bubble levels let you know when you've leveled the seat, and the LATCH connectors tighten easily with ONE PULL strap. Also, the instruction manual has a storage compartment so you don't lose it if you have look something up (like how to install it in a different type of car or without the base or when baby needs to switch to a bigger seat). My husband and I have joked that Chicco's seats are "marriage savers" because while we've heard other people complain about installing their kid's car seats, Chicco's are so easy to install we don't argue or get mad at each other while doing it.
Other reasons I love this seat...
--The straps are easily loosened and tightened, AND the shoulder pads are now easily removable! Just unvelcro them and you can toss them in the wash whenever they get drool or spit up on them.
--The canopy can be unzipped on the back so that it rotates all the way forward in front of baby's face for when the sun is coming in the back of the car. The visor on the front also zips off or the whole canopy can be removed completely.
--It comes with a zip off "boot" which is like a padded blanket for over baby's legs, and won't blow away in the winter wind.
--It's quality AND it's pretty. The fabric is soft and plush and not plastic-y feeling. The serene model is a light gray and light turquoise. I think it can easily be used boy or girl.
--It comes with all of these features, but doesn't break the bank. Some infant seats can be over $300!
--It's compatible with A TON of strollers.
--The padding on this car seat is plush, and I remember with our original Keyfit30 that our kids would sweat on their backs in the summer because the plushness didn't allow for a lot of airflow. I will be curious to see if that is still the same with my 3rd child and the new seat come summer. That being said, I know Chicco also makes a "Keyfit30 Zip Air" that is supposed to have a more breathable material on the seat (but maybe that one would be colder in the winter? I don't know.)
--When I read a description of the Keyfit30 zip (on another website), I thought the actual seat cover would zip off much like the Chicco Nextfit Zip does. That's not the case. The cover is still easily removable and washable, but it's not with a zipper. Just a heads up in case you read a review on another website like I did. The parts that zip off are the canopy, visor, and boot.