Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not so ergonomic to me.

Didn't fit my body requirements. Now, I don't feel there is much wrong with my anatomy there :-), as I am not heavy, just, maybe have somewhat wide body frame. After few miles over asphalt, this seat felt notably worse that standard comfort seat, that came with older inexpensive bike from Costco, that I borrowed for comparison... that other seat was good enough for me, but I still have to let my son continue using it.Schwinn seat feels too narrow and too soft, so after a short while my body sets down against the harder internal parts of the seat and starts hurting, so I am returning it. Maybe it fits well someone really lightweight and narrow-framed, not my case.