Bests & Worsts Reviews from Amazon

When I first got these ramps, I really loved them. Very portable, easy to store, and I had no problems at all getting my car up on the ramps. I used them twice for oil changes on my car, and experienced absolutely no issues. (car's curb weight is about 3500 pounds, well under the advertised rating) However, very recently, I took these ramps with me as I was going to look at a used car and I wanted a look underneath. Right as I was putting the ramps down however, I noticed a 3-inch crack in one of the ramps in a structural area. I have no idea how this crack even got on the ramp, as I inspected them the last time I used them, and I store them indoors where they are not susceptible to temperature fluctuations. I really wanted to give this product a good review, as I love the concept. But after this experience, I simply cannot trust these ramps. The chances of them failing with me under the car are just too great, it's not worth the risk. Personally, based on my observations of my crack and the cracks other people have experienced with these ramps, it always seems to propagate at the same area. I can't be certain, but the design or manufacturing process of these ramps may be fundamentally flawed. It seems like there is too much play in the plastic right near the edges, the plastic seems a bit too brittle, and stress concentratiors have not been adequately designed out. Again, this is speculation, maybe I have a defective unit, but considering that some people have experienced failures similar to me, I would not trust any of these ramps until they were redesigned.