Sitting in our living room, it's big enough for my 50-51" 6.5 yo, which is pretty impressive in itself. She's outgrown every other convertible seat on the market. (Who knows if it will work installed in the car, but it's not for her anyway.)
DD2 is on the 3rd or 4th height slot I think. It's a little hard to tell exactly where the shoulder strap starts to keep it at or below her shoulders. It seems to really recline a lot, so hopefully it won't take up any more room than our True Fit does rfing. The height should adjust just fine to keep her rfing all the way to 40 lbs though.
It the problem tightening the harness strap just when it's installed rfing?
Re: Got my Graco My Size 70 yesterday!
The bolded part is one of the things that bothered me about the seat. I played with it a lot in the store (and drove DH crazy) and I didn't feel confident about where it was at shoulder-wise.
And yes, from what I read the problems usually only happen when it's installed. But it doesn't happen to every one so hopefully you've got a good one!
3 of my seats have only had issues while installed, the other one had issues after a few weeks, and wouldn't tighten completely uninstalled either.
Mine is annoying me now, because I had to move the headrest up, and not it rattles in the car all the time.
Good luck!