Update: 12/22/24After another failed attempt at booster training, we are returning to using the harness in this seat. While mostly well-behaved in booster-mode, my (now 8yo) grandson remains inconsistent; if he drops a toy, or is very tired and overstimulated, he gets antsy, and sometimes wiggles himself out of the shoulder belt. He is 47 inches tall now, weighs 43.5 lbs, and is on the second-to-last notch on the headrest. I’m waiting another 6-12 mos. to try booster training again.********************************************************************************************************************5/10/2024 (original post): First, let me say that this seat is for older, bigger children. It cannot rear-face, and while the minimum weight is listed at 25lb, for safety reasons, children of that weight should remain in a rear-facing seat until they outgrow it.I ordered this seat for a few reasons. One reason was that I needed a seat with a higher harness limit than most standard seats. The harness on the My Fit goes to 19.5 inches from the seat; 1.5 inches higher than our Graco 4Ever DLX. My grandson is 7.5yo and is ASD level 2; he is wiggly and impulsive, and definitely not ready for booster training yet (we’ve tried). For reference, he is 46 inches tall and weighs 42lb. According to my research, each inch of seat height is roughly equal to one year of growth. He has a couple of inches of growth room in the My Fit harness, and hopefully will be more ready for a booster in the next year or so. I have done much reading over the past month, and I am impressed with the safety ratings of this seat. I also like the thick, comfortable padding.My son and DIL have had the base model of the My Fit in their car for the past two years (the cover does not zip off), and they really like their seat. I chose the My Fit Zip model with the zip-off lining, and I would urge anybody who has a child not fully potty trained, or one that drinks in the car seat, to upgrade to the My Fit Zip. It is worth the extra money to be able to unzip the pads and toss them in the wash without taking the whole seat out of the car to remove the cover.I installed the seat using the vehicle seat belt, because my grandson weighs more than 40lb. I have a 2022 Mitsubishi Eclipse Cross. This seat is a bit bulkier than our Graco 4Ever DLX, and weighs a couple of pounds more, but it fit well in my vehicle and it was as easy to install with the seat belt as our Graco was.The width of the seat is listed as 17 or 17.5 inches on several review sites, but the width of the seat where it meets the vehicle seat back is roughly 11.5-12 inches, so it will fit in smaller cars.I am extremely happy with the quality and heavy-duty construction of this seat; it is well worth the money we paid!