I have a devil of a time tightening the straps on my dd's Safety 1st Complete Air. After loads of research I felt like it was one of the safest seats...unless you aren't tightening the straps correctly in which case I wouldn't think it would perform well in an accident. I don't know if I'm just being anal or if I truly have a problem with this car seat. I can pinch the straps when they are as tight they can possibly go. And I pretty easily slip my palm through between the straps and her chest/belly. She doesn't wear any heavy clothing or anything. I have read tons of reviews where other people have trouble tightening these straps, too. We actually have two models (long story but insurance bought us a second seat and by that point Safety 1st had updated the seat we purchased orginally so we have two versions). Since I have this issue with both seats, I assume it's isn't a defect with the seat and that they are all this way. I always wonder if the parents who don't have a problem with the seat just aren't that concerned with tighteing it properly.
So should the straps be tight enough to where you can't pinch them up? I feel worried every single time I drive my dd around.