This is our second Pet Ramp that we purchased to more easily walk on/off of our boat which sits on a lift just a little too far from the dock to easily step onto.  Our first one disappeared one day and I can assume someone else is enjoying easier access to their boat as well.  We don't telescope this out all the way which makes for less sag in the middle when walking on it.  Rated for large dogs and not humans, we take care when using this but we are quite pleased with this solution to our boat access problem.  Pros: Sturdy, adjustable length, skid-proof tread is good for wet location, carrying handle.