If you want something compact, this is THE one. Fits 3 across in a small sedan - amazing. There is NO other narrower seat on the market. It's heavier (20+lbs) than the Britax Roundabout for example, which isn't as ideal for moving in & out or carrying through the airport, but it's actually is one of the lighter ones once you need to graduate past the 35lb max seats. We have the Radian 60 (goes up to 60 lbs). I'd read the 80 (lb) was the exact same structure, just more padding, so we saved the $50 and went with the 60.