Ok. So please forgive all of the pictures but when I was looking for new car seats seeing actual comparison pictures really helped me make my decision. We are upgrading from the Graco extend2fit car seat. I drive a 2015 Subaru crosstrek, the smallest of the Subaru crossover line. Middle seat room is important as there is a teenager in our house that sometimes needs to sit in the back for ull family outings (if I could do it all again, I would have just bought the minivan that I swore up and down we didn’t need and I didn’t want)
Anyway, comparing the two seats side by side, you can see the the extend2fit sits on a bit of a higher base. The lack of armrest and the flip out cup holders do make the seat a bit slimmer on the slimfit. The back and headrest are similar on both seats but a difference that was noticable is the the back of the slimfit is a solid panel as opposed to the extend2fit with an open back. This difference is mearly cosmetic and they are both functional.
The recline option is the same, the padding is the same, the wonderful sliding headrest to adjust height is the same (this is also my most favorite option on the Graco seats)
The seat looks comfortable, the install for rear facing was straight forward; forward facing you have to remove the latch and slide it through the rear pass (didn’t know that, called Graco and a tech walked me through it) I did get my hand fully stuck trying to get the latch through the rear pass but that’s water under the bridge at this point.
The seat seems a bit lighter than the extend2fit but this is a heavy seat, this is not a great choice if you move car seats on a regular basis or want to lug it through the airport.
I love that all of the padding is removable and machine washable, I don’t love that without the infant seat insert there are a ton of cracks and slips through the fabric for animal crackers and gummy snacks to migrate to.
All in all, this is a sturdy, well built seat that does become a booster (which is a bonus that I won’t need another car seat for the kids down the road)
TL;DR The seat doesn’t seem much smaller than extend2fit but it’s nice. Installation was ok. 10/10 would buy again.