Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Awkward, Heavy, Where's the Slack?

I bought this car seat based upon the written reviews here. Well, after having baby and working with this super-wide car seat, you quickly realize your walking is limited to about 10 steps. Now my baby is four days short of 5 months old and over 20 lbs. (! I know! Huge!) and together, this car seat and baby are approaching 40 lbs! I can barely lift it into my car, and cannot maneuver it at all. I am now moving him out of it and straight into a Britax Marathon and giving up on the "systems." Also, I did move the straps on the Graco to the middle level and they are getting tight on junior, and I moved them to the top level and there is NO SLACK whatsoever - I almost cannot buckle in a 5-month old baby.