The tri-fold design is a bit awkward to open if you're a little person and does take a little bit of strength to carry, but otherwise this ramp is great for large dogs. I have three of them and two of them will go right up without any issues (the third one is blind and gets scared, but with guidance he too makes it just fine). I hold mine by the collar and just give them a little bit of guidance making sure they're not running "off" the ramp, as they like to be in a hurry going up. The ramp is plenty wide for my120lb lab/newfie mix and holds his weight with no trouble. The surface is a bit rough and feels like sand paper to your hand, and they do slide on it a bit, especially if their nails are longer than they are supposed to be. If you keep our dogs nails trimmed then their pads grab the surface pretty good and they don't slide. I think the sliding is also depending on each dog and how they walk up the ramp. I have not noticed any major sliding as they go down on it. I hold them by their collar and guide them down as well. All in all a great product and works well on my Terrain.