Product review (5 stars): Perfect fit. Replaced copper line.
My copper line kinked and was worried that it would eventually leak so I went ahead and got this.  It fit perfectly in my existing water valve and fridge water line.

Great material and was very easy to feed behind my cabinets. Pex was much more firm than I thought and would take this over rubber any day. Water does not have a rubbery taste after installing this.

Took me 10 minutes to feed through cabinets and install to the water line and fridge.