We purchased this for a large mastiff (167 lbs) to get in/out of a truck and camper.  We got him used to it by having him go on/off our porch with it, and then moved to the steeper truck and camper.  It can be a bit slippery in the rain but the ridges help with grip.  Watch out when you fold it, because as the directions state, it can really pinch if your fingers are in the wrong place when you fold..  This is a lifesaver for us as we could not lift our mastiff into our truck or camper, and this ramp stows folded in the truck between the back seat and front seat, in the bed of the truck, or in the "basement" of the camper. We had a tri-fold ramp before this one and it was far heavier and harder to handle, yet did not seem to be as secure for him.  We like this one and will be purchasing another one just like it so we can have one in the truck and one in the camper all the time.