Beth - I was wrong, the true fit only goes to 35 lbs RF. My mistake, I thought it was 45 but I think only the Radians do that. Sorry. I ended up getting one just this week as well for DS for my mom's car because he's quite a peanut, he's just 20 lbs now at 15 mos, so I figure it will last him a while RF. I may have to turn him before I do in my own car but for a grandparent seat I think it will do the job long enough. It's a really nice seat otherwise! I like it, easy to adjust the harness straps up and down, the crotch buckle, has built in lock offs, was pretty easy to install and doesn't take up so much room behind the passenger seat RF as the Radian does.
BTW the new Britax seats RF to 40 lbs but people are complaing about them because even though they've upped the weight limit they've made the shell height shorter, they claim to make it better to install. They also claim that it will not make the child outgrow them faster but I don't see how this is possible.
My apologies again for the mis-info on the true fit!! I was sure it was one of the higher ones.