It's worth to buy! It's slim so if you have 3 kids, it can fit 3 carseats in a row.
The Best Booster Seat I've found
I did tons of research and finally settled on this booster for my giant boy. I love the fact that it has latch to hold the seat in place, it will recline, and the cover comes off easily to wash. BONUS- you can order a extra cover on the company website! I keep the extra in the back of my car in case of spills, and to easily switch for cleaning.