So far we are very happy with this ramp.  Ramp arrived as scheduled on 11/2/17.  We needed a weather proof ramp for out the back patio door for our 14 year old dog with arthritis and hip dysplasia.  For the last 8 months, our dog has been hesitating to make the step out the patio door, down the stoop and then down to the patio.  Sometimes we have to carry her out (67 pounds!)  This ramp is perfect for our needs.  It's very sturdy and well constructed and the ridges give our dog traction.  Its rained almost every day since we received it.  We just leave it outside 24/7.  It's nice to know we can use this to get her in the car when needed as well.  The ramp is heavy, but that contributes to its sturdiness so that is not an issue for us.  We're happy that we found this ramp!