First of all, the height limits on this seat are incorrectly advertised. Britax has published that this seat has a maximum standing height of 49” for harness mode, however they also state that it has a maximum seated height of 20.5” for harness mode. For clarification on why these two heights don’t match up: the other Britax seats that are known to have a max seated height of 20.5” also have a max standing height of 58”. So obviously if this seat has a max seated height of 20.5” (which it truly does), by default the standing height must be higher. I have contacted Britax about this but they are unwilling to admit the error, which is a shame because most people who are looking for a harness to booster seat with a higher height limit (like we were) are going to pass over this seat based on the incorrectly published standing height limit, and not dig deeper to realize that the seated height limit is actually quite high. So to recap: this seat has a 20.5” seated height limit for harness mode, which is equivalent to a 56”-58” standing height limit, and is therefore an excellent option for people who wish to keep their older (or just taller) kids in a harness for longer. Our 5.5 year old is 46” tall, but has a long torso and has outgrown her excellent Britax Boulevard car seat, which has an 18.5” seated height limit and a 49” standing height limit. I’ve played around with the harness height on this new Grow With You seat, and it still has several more inches to go up in harness mode from where it fits her now, which means we will be able to keep her in a harness for a good while longer before we need to convert to booster mode. This seat seems comfortable from what I can tell (and from what my daughter tells me). It has a nice wide seat and it is roomy in her shoulders (unlike the Chicco MyFit we tried out which had a shockingly narrow seat and not much shoulder room width-wise), and I have no doubt that this seat has enough room for her to grow over the next 5+ years that we will need it. As always the Britax ClickTight feature is a game changer for quick, easy, and correct installation. Something to note however, is that the base of this seat is different from the Boulevard and Marathon seats, meaning the ClickTight feature on this seat is also different. Although we have owned a Britax Boulevard ClickTight seat for the past 5 years, I did not intuitively know how to use the Grow With You ClickTight, and I did need to read the instruction manual. However, once I read the manual it was a piece of cake and I was able to securely install the seat in minutes. Also, I’ve read that there were issues with tightening the harness straps on the Frontier and Pinnacle seats. This Grow With You seat does not have any of those issues; it tightens and loosens easily and securely. And of course, the color choices on this seat are quite nice, and my daughter LOVES her purple seat. My only complaint is that the fabric is not machine washable with this model. That should be a standard feature on EVERY car seat, and I do find that really irritating. But overall this is an excellent seat, as I have come to expect from Britax. I’ve attached a picture comparing our old Boulevard seat (left) at its highest harness setting, with our new Grow With You seat (right) at one of its middle harness settings.